[Backport 2.x] [Refactor] Sets util from server to common lib (opense…

…arch-project#7090) (opensearch-project#8230)

Refactors the Sets utility class from the server module to the common
library.

Signed-off-by: Nicholas Walter Knize <nknize@apache.org>
(cherry picked from commit b5d9a3f)
Signed-off-by: github-actions[bot] <github-actions[bot]@users.noreply.github.com>

* update changelog

Signed-off-by: Nicholas Walter Knize <nknize@apache.org>

---------

Signed-off-by: Nicholas Walter Knize <nknize@apache.org>
Signed-off-by: github-actions[bot] <github-actions[bot]@users.noreply.github.com>
Co-authored-by: github-actions[bot] <github-actions[bot]@users.noreply.github.com>
Co-authored-by: Nicholas Walter Knize <nknize@apache.org>

CHANGELOG.md

@@ -55,6 +55,7 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 - Allow insecure string settings to warn-log usage and advise to migration of a newer secure variant ([#5496](https://github.com/opensearch-project/OpenSearch/pull/5496))
 - Pass localNode info to all plugins on node start ([#7919](https://github.com/opensearch-project/OpenSearch/pull/7919)
 - Compress and cache cluster state during validate join request ([#7321](https://github.com/opensearch-project/OpenSearch/pull/7321))
+- [Refactor] Sets util from server to common lib ([#8230](https://github.com/opensearch-project/OpenSearch/pull/8230))
 
 ### Deprecated
 

libs/common/build.gradle

@@ -32,6 +32,10 @@ dependencies {
   }
 }
 
+tasks.withType(JavaCompile).configureEach {
+  options.compilerArgs -= '-Xlint:unchecked'
+}
+
 tasks.named('forbiddenApisMain').configure {
   // :libs:opensearch-common does not depend on server
   // TODO: Need to decide how we want to handle for forbidden signatures with the changes to server