[DOCS] Add anchors for Asciidoctor migration (#41648)

Author: jrodewig

docs/reference/aggregations/bucket/diversified-sampler-aggregation.asciidoc

@@ -186,6 +186,7 @@ Please note that Elasticsearch will ignore the choice of execution hint if it is
 
 ==== Limitations
 
+[[div-sampler-breadth-first-nested-agg]]
 ===== Cannot be nested under `breadth_first` aggregations
 Being a quality-based filter the diversified_sampler aggregation needs access to the relevance score produced for each document.
 It therefore cannot be nested under a `terms` aggregation which has the `collect_mode` switched from the default `depth_first` mode to `breadth_first` as this discards scores.
@@ -194,6 +195,7 @@ In this situation an error will be thrown.
 ===== Limited de-dup logic.
 The de-duplication logic applies only at a shard level so will not apply across shards.
 
+[[spec-syntax-geo-date-fields]]
 ===== No specialized syntax for geo/date fields
 Currently the syntax for defining the diversifying values is defined by a choice of `field` or
 `script` - there is no added syntactical sugar for expressing geo or date units such as "7d" (7

docs/reference/aggregations/bucket/filters-aggregation.asciidoc

@@ -118,6 +118,7 @@ request.  The response for this example would be:
 // TESTRESPONSE[s/"_shards": \.\.\./"_shards": $body._shards/]
 // TESTRESPONSE[s/"hits": \.\.\./"hits": $body.hits/]
 
+[[other-bucket]]
 ==== `Other` Bucket
 
 The `other_bucket` parameter can be set to add a bucket to the response which will contain all documents that do 

docs/reference/aggregations/bucket/sampler-aggregation.asciidoc

@@ -155,6 +155,7 @@ The default value is 100.
 
 ==== Limitations
 
+[[sampler-breadth-first-nested-agg]]
 ===== Cannot be nested under `breadth_first` aggregations
 Being a quality-based filter the sampler aggregation needs access to the relevance score produced for each document.
 It therefore cannot be nested under a `terms` aggregation which has the `collect_mode` switched from the default `depth_first` mode to `breadth_first` as this discards scores.

docs/reference/aggregations/bucket/significantterms-aggregation.asciidoc

@@ -436,6 +436,7 @@ Available parameters in the script are
 `_subset_size`:: Number of documents in the subset.
 `_superset_size`:: Number of documents in the superset.
 
+[[sig-terms-shard-size]]
 ===== Size & Shard Size
 
 The `size` parameter can be set to define how many term buckets should be returned out of the overall terms list. By

docs/reference/aggregations/bucket/significanttext-aggregation.asciidoc

@@ -92,7 +92,7 @@ It only occurs 5 times in our index as a whole (see the `bg_count`) and yet 4 of
 were lucky enough to appear in our 100 document sample of "bird flu" results. That suggests
 a significant word and one which the user can potentially add to their search. 
 
-
+[[filter-duplicate-text-noisy-data]]
 ==== Dealing with noisy data using `filter_duplicate_text`
 Free-text fields often contain a mix of original content and mechanical copies of text (cut-and-paste biographies, email reply chains, 
 retweets, boilerplate headers/footers, page navigation menus, sidebar news links, copyright notices, standard disclaimers, addresses).
@@ -353,7 +353,7 @@ However, the `size` and `shard size` settings covered in the next section provid
 
 This aggregation supports the same scoring heuristics (JLH, mutual_information, gnd, chi_square etc) as the <<search-aggregations-bucket-significantterms-aggregation,significant terms>> aggregation
 
-
+[[sig-text-shard-size]]
 ===== Size & Shard Size
 
 The `size` parameter can be set to define how many term buckets should be returned out of the overall terms list. By

docs/reference/aggregations/metrics/weighted-avg-aggregation.asciidoc

@@ -12,7 +12,9 @@ As a formula, a weighted average is the `∑(value * weight) / ∑(weight)`
 
 A regular average can be thought of as a weighted average where every value has an implicit weight of `1`.
 
+[[weighted-avg-params]]
 .`weighted_avg` Parameters
+[options="header"]
 |===
 |Parameter Name |Description |Required |Default Value
 |`value` | The configuration for the field or script that provides the values |Required |
@@ -23,15 +25,19 @@ A regular average can be thought of as a weighted average where every value has
 
 The `value` and `weight` objects have per-field specific configuration:
 
+[[value-params]]
 .`value` Parameters
+[options="header"]
 |===
 |Parameter Name |Description |Required |Default Value
 |`field` | The field that values should be extracted from |Required |
 |`missing` | A value to use if the field is missing entirely |Optional |
 |`script` | A script which provides the values for the document.  This is mutually exclusive with `field` |Optional
 |===
 
+[[weight-params]]
 .`weight` Parameters
+[options="header"]
 |===
 |Parameter Name |Description |Required |Default Value
 |`field` | The field that weights should be extracted from |Required |

docs/reference/aggregations/pipeline/avg-bucket-aggregation.asciidoc

@@ -4,6 +4,7 @@
 A sibling pipeline aggregation which calculates the (mean) average value of a specified metric in a sibling aggregation.
 The specified metric must be numeric and the sibling aggregation must be a multi-bucket aggregation.
 
+[[avg-bucket-agg-syntax]]
 ==== Syntax
 
 An `avg_bucket` aggregation looks like this in isolation:
@@ -18,7 +19,9 @@ An `avg_bucket` aggregation looks like this in isolation:
 --------------------------------------------------
 // NOTCONSOLE
 
+[[avg-bucket-params]]
 .`avg_bucket` Parameters
+[options="header"]
 |===
 |Parameter Name |Description |Required |Default Value
 |`buckets_path` |The path to the buckets we wish to find the average for (see <<buckets-path-syntax>> for more

docs/reference/aggregations/pipeline/bucket-script-aggregation.asciidoc

@@ -4,6 +4,7 @@
 A parent pipeline aggregation which executes a script which can perform per bucket computations on specified metrics
 in the parent multi-bucket aggregation. The specified metric must be numeric and the script must return a numeric value.
 
+[[bucket-script-agg-syntax]]
 ==== Syntax
 
 A `bucket_script` aggregation looks like this in isolation:
@@ -24,8 +25,9 @@ A `bucket_script` aggregation looks like this in isolation:
 <1> Here, `my_var1` is the name of the variable for this buckets path to use in the script, `the_sum` is the path to
 the metrics to use for that variable.
 
-
+[[bucket-script-params]]
 .`bucket_script` Parameters
+[options="header"]
 |===
 |Parameter Name |Description |Required |Default Value
 |`script` |The script to run for this aggregation. The script can be inline, file or indexed. (see <<modules-scripting>>

docs/reference/aggregations/pipeline/bucket-selector-aggregation.asciidoc

@@ -29,8 +29,9 @@ A `bucket_selector` aggregation looks like this in isolation:
 <1> Here, `my_var1` is the name of the variable for this buckets path to use in the script, `the_sum` is the path to
 the metrics to use for that variable.
 
-
+[[bucket-selector-params]]
 .`bucket_selector` Parameters
+[options="header"]
 |===
 |Parameter Name |Description |Required |Default Value
 |`script` |The script to run for this aggregation. The script can be inline, file or indexed. (see <<modules-scripting>>

docs/reference/aggregations/pipeline/bucket-sort-aggregation.asciidoc

@@ -33,7 +33,9 @@ A `bucket_sort` aggregation looks like this in isolation:
 <1> Here, `sort_field_1` is the bucket path to the variable to be used as the primary sort and its order
 is ascending.
 
+[[bucket-sort-params]]
 .`bucket_sort` Parameters
+[options="header"]
 |===
 |Parameter Name |Description |Required |Default Value
 |`sort` |The list of fields to sort on. See <<search-request-sort,`sort`>> for more details. |Optional |