[FEATURE] Set cross-cluster-replication plugin 3.0.0 baseline JDK version to JDK-21

[reta]

Is your feature request related to a problem? Please describe

Set cross-cluster-replication plugin 3.0.0 baseline JDK version to JDK-21

Describe the solution you'd like

See please opensearch-project/OpenSearch#10745

Related component

Build

Describe alternatives you've considered

N/A

Additional context

See please opensearch-project/OpenSearch#14011

[dblock]

[Catch All Triage - Attendees 1, 2, 3, 4, 5]

[aggarwalShivani]

Hi,
Is there a timeline when this update is planned for ccr repo?
ccr has a dependency on common-utils, which has already been updated](opensearch-project/common-utils#744) to jdk 21.

I'm facing some compile-time issues when importing the common-utils jar built on jdk21, when ccr is still on jdk11.