[8.x] Configure index sorting through index settings for logsdb (elastic#118968) (elastic#119936)

* Configure index sorting through index settings for logsdb (elastic#118968)

* Skip injecting `host.name` for incompatible mappings in logsdb mode

* spotless

* Update docs/changelog/118856.yaml

* fix tsdb

* Configure index sorting through index settings for logsdb

* fix synthetic source usage

* skip injecting host.name

* fix test

* fix compat

* more tests

* add index versioning

* add index versioning

* add index versioning

* minor refactoring

* Update docs/changelog/118968.yaml

* address comments

* inject host.name when possible

* check subobjects

* private settings

(cherry picked from commit 5baf5af)

# Conflicts:
#	rest-api-spec/build.gradle
#	server/src/main/java/org/elasticsearch/index/IndexVersions.java
#	server/src/main/resources/META-INF/services/org.elasticsearch.features.FeatureSpecification
#	x-pack/plugin/logsdb/src/main/java/org/elasticsearch/xpack/logsdb/LogsDBPlugin.java

* update index versions

* [CI] Auto commit changes from spotless

* update index versions

---------

Co-authored-by: elasticsearchmachine <[email protected]>

Author: kkrik-es

docs/changelog/118968.yaml

@@ -0,0 +1,6 @@
+pr: 118968
+summary: Configure index sorting through index settings for logsdb
+area: Logs
+type: enhancement
+issues:
+ - 118686