Upgrade pulp-maven to 0.21.2 (#1318)

* Fixed repair_metadata not removing orphaned metadata for (group_id, artifact_id)
pairs that no longer have any corresponding MavenArtifact in the repository. Previously
it returned early when no artifacts existed and only cleaned up version=None metadata,
leaving version-level metadata behind.
* Fixed repair_metadata failing with AssertionError in pulpcore's _compute_counts()
due to finalize_new_version redundantly running _generate_metadata after
repair_metadata had already managed all metadata content in the repository version.

Author: git-hyagi

pulp_service/requirements.txt

@@ -4,7 +4,7 @@ solv>=0.7.21,<0.7.38
 pulp-python==3.30.3
 pulp-npm==0.8.0
 pulp-container==2.28.0
-pulp-maven==0.21.0
+pulp-maven==0.21.2
 pulp-hugging-face==0.3.0
 pulp-cli
 requests