Add support for ccr follow info api to HLRC. (#39115)

This API was introduces after #33824 was closed.

docs/java-rest/high-level/ccr/get_follow_info.asciidoc

@@ -0,0 +1,35 @@
+--
+:api: ccr-get-follow-info
+:request: FollowInfoRequest
+:response: FollowInfoResponse
+--
+
+[id="{upid}-{api}"]
+=== Get Follow Info API
+
+
+[id="{upid}-{api}-request"]
+==== Request
+
+The Get Follow Info API allows you to get follow information (parameters and status) for specific follower indices.
+
+["source","java",subs="attributes,callouts,macros"]
+--------------------------------------------------
+include-tagged::{doc-tests-file}[{api}-request]
+--------------------------------------------------
+<1> The follower index to get follow information for.
+
+[id="{upid}-{api}-response"]
+==== Response
+
+The returned +{response}+ includes follow information for the specified follower indices
+
+["source","java",subs="attributes,callouts,macros"]
+--------------------------------------------------
+include-tagged::{doc-tests-file}[{api}-response]
+--------------------------------------------------
+<1> The follow information for specified follower indices.
+
+include::../execution.asciidoc[]
+
+

docs/java-rest/high-level/supported-apis.asciidoc

@@ -507,6 +507,7 @@ The Java High Level REST Client supports the following CCR APIs:
 * <<{upid}-ccr-get-auto-follow-pattern>>
 * <<{upid}-ccr-get-stats>>
 * <<{upid}-ccr-get-follow-stats>>
+* <<{upid}-ccr-get-follow-info>>
 
 include::ccr/put_follow.asciidoc[]
 include::ccr/pause_follow.asciidoc[]
@@ -517,6 +518,7 @@ include::ccr/delete_auto_follow_pattern.asciidoc[]
 include::ccr/get_auto_follow_pattern.asciidoc[]
 include::ccr/get_stats.asciidoc[]
 include::ccr/get_follow_stats.asciidoc[]
+include::ccr/get_follow_info.asciidoc[]
 
 == Index Lifecycle Management APIs