[BUG] Replace (and block) uses of org.apache.logging.log4j.util.Strings

[msfroh]

Describe the bug

In #13620, @reta correctly caught an incorrect use of org.apache.logging.log4j.util.Strings instead of org.opensearch.core.common.Strings.

I tried adding org.apache.logging.log4j.util.String to https://github.com/opensearch-project/OpenSearch/blob/main/buildSrc/src/main/resources/forbidden/opensearch-all-signatures.txt, and got the following errors (including the one I had added by accident):

Forbidden class/interface use: org.apache.logging.log4j.util.Strings [use (or add) helpers to org.opensearch.common.util instead]
  in org.opensearch.env.NodeEnvironment (NodeEnvironment.java:1303)
Forbidden class/interface use: org.apache.logging.log4j.util.Strings [use (or add) helpers to org.opensearch.common.util instead]
  in org.opensearch.index.IndexModule$DataLocalityType (IndexModule.java:583)
Forbidden class/interface use: org.apache.logging.log4j.util.Strings [use (or add) helpers to org.opensearch.common.util instead]
  in org.opensearch.gateway.remote.RemoteClusterStateCleanupManager (RemoteClusterStateCleanupManager.java:128)
Forbidden class/interface use: org.apache.logging.log4j.util.Strings [use (or add) helpers to org.opensearch.common.util instead]
  in org.opensearch.gateway.remote.RemoteClusterStateCleanupManager (RemoteClusterStateCleanupManager.java:129)
Forbidden class/interface use: org.apache.logging.log4j.util.Strings [use (or add) helpers to org.opensearch.common.util instead]
  in org.opensearch.index.shard.ShardPath (ShardPath.java:208)
Forbidden class/interface use: org.apache.logging.log4j.util.Strings [use (or add) helpers to org.opensearch.common.util instead]
  in org.opensearch.common.xcontent.JsonToStringXContentParser (JsonToStringXContentParser.java:113)
Forbidden class/interface use: org.apache.logging.log4j.util.Strings [use (or add) helpers to org.opensearch.common.util instead]
  in org.opensearch.common.logging.JsonThrowablePatternConverter (JsonThrowablePatternConverter.java:87)
Scanned 7503 class file(s) for forbidden API invocations (in 13.70s), 7 error(s).

Related component

Libraries

To Reproduce

1. Add org.apache.logging.log4j.util.Strings and joptsimple.internal.Strings to https://github.com/opensearch-project/OpenSearch/blob/main/buildSrc/src/main/resources/forbidden/opensearch-all-signatures.txt
2. Run ./gradlew precommit
3. Observe build failures.

Expected behavior

These existing uses of org.apache.logging.log4j.util.Strings should be replaced with uses of org.opensearch.core.common.Strings.

Additional Details

N/A

[msfroh]

We also have one incorrect use of joptsimple.internal.Strings in https://github.com/opensearch-project/OpenSearch/blob/main/test/framework/src/main/java/org/opensearch/client/RestClientBuilderTestCase.java