Shared cache's recovery range should be aligned with page size (elastic#74439)

Shared cache expects read and write operations to be aligned 
with a given page size (4096 bytes). The recovery range size 
setting should be validated against this constraint and the 
integration tests should not try to set a non-aligned setting 
value.

Closes elastic#74372

Author: tlrx

x-pack/plugin/searchable-snapshots/src/internalClusterTest/java/org/elasticsearch/xpack/searchablesnapshots/BaseSearchableSnapshotsIntegTestCase.java

@@ -120,7 +120,9 @@ protected Settings nodeSettings(int nodeOrdinal, Settings otherSettings) {
         if (randomBoolean()) {
             builder.put(
                 FrozenCacheService.FROZEN_CACHE_RECOVERY_RANGE_SIZE_SETTING.getKey(),
-                new ByteSizeValue(randomIntBetween(4, 1024), ByteSizeUnit.KB)
+                rarely()
+                    ? pageAligned(new ByteSizeValue(randomIntBetween(4, 1024), ByteSizeUnit.KB))
+                    : pageAligned(new ByteSizeValue(randomIntBetween(1, 10), ByteSizeUnit.MB))
             );
         }
         return builder.build();

x-pack/plugin/searchable-snapshots/src/main/java/org/elasticsearch/xpack/searchablesnapshots/cache/shared/FrozenCacheService.java

@@ -81,6 +81,14 @@ public class FrozenCacheService implements Releasable {
         Setting.Property.NodeScope
     );
 
+    public static final Setting<ByteSizeValue> FROZEN_CACHE_RECOVERY_RANGE_SIZE_SETTING = new Setting<>(
+        SHARED_CACHE_SETTINGS_PREFIX + "recovery_range_size",
+        ByteSizeValue.ofKb(128L).getStringRep(),
+        s -> ByteSizeValue.parseBytesSizeValue(s, SHARED_CACHE_SETTINGS_PREFIX + "recovery_range_size"),
+        getPageSizeAlignedByteSizeValueValidator(SHARED_CACHE_SETTINGS_PREFIX + "recovery_range_size"),
+        Setting.Property.NodeScope
+    );
+
     public static final Setting<ByteSizeValue> SNAPSHOT_CACHE_REGION_SIZE_SETTING = new Setting<>(
         SHARED_CACHE_SETTINGS_PREFIX + "region_size",
         SHARED_CACHE_RANGE_SIZE_SETTING,
@@ -212,14 +220,6 @@ public void validate(ByteSizeValue value, Map<Setting<?>, Object> settings, bool
         Setting.Property.NodeScope
     );
 
-    public static final Setting<ByteSizeValue> FROZEN_CACHE_RECOVERY_RANGE_SIZE_SETTING = Setting.byteSizeSetting(
-        SHARED_CACHE_SETTINGS_PREFIX + "recovery_range_size",
-        new ByteSizeValue(128, ByteSizeUnit.KB),                // default
-        MIN_SNAPSHOT_CACHE_RANGE_SIZE,                          // min
-        MAX_SNAPSHOT_CACHE_RANGE_SIZE,                          // max
-        Setting.Property.NodeScope
-    );
-
     public static final TimeValue MIN_SNAPSHOT_CACHE_DECAY_INTERVAL = TimeValue.timeValueSeconds(1L);
     public static final Setting<TimeValue> SNAPSHOT_CACHE_DECAY_INTERVAL_SETTING = Setting.timeSetting(
         SHARED_CACHE_SETTINGS_PREFIX + "decay.interval",