Aggs: Unmute and fix CCSDuelIT flaky tests

[ivancea]

Fixes #132879
Fixed #132880

Ignore doc_count_error_upper_bound in response comparison for terms aggs in CCSDuelIT, and unmute tests.

It was failing sometimes with a: doc_count_error_upper_bound: expected Integer [5] but was Integer [2]

Given it's an estimation (From https://www.elastic.co/docs/reference/aggregations/search-aggregations-bucket-terms-aggregation), ignoring should be safe for the test purposes.

[elasticsearchmachine]

Pinging @elastic/es-analytical-engine (Team:Analytics)

[cimequinox]

This change extends the differenceBetweenMapsIgnoringArrayOrder utility.
This utility finds differences in two trees of Map<String,Object> nodes where the
string is the node's name and the object appears to be the nodes children which
may be a Map or List of maps. The existing logic compares two trees, descending
the first looking for a difference in the second until one is found.

This extends the logic to accept a pathFilter predicate allowing subtrees matching a path to be skipped and uses the enhancement to instruct testTermsAggs and testTermsAggsWithProfile to skip doc_count_error_upper_bound subtrees by passing the predicate path -> path.endsWith("/doc_count_error_upper_bound") == false.

The change includes unit tests for the enhancement and unmutes two tests as specified in the description.