Unmute MultiVersionRepositoryAccessIT.testReadOnlyRepo (elastic#115215)

I think the test failure opened is not correct, and relates to another
failure.

Relates elastic#114999 and
elastic#114997.

Author: pxsalehi

muted-tests.yml

@@ -308,9 +308,6 @@ tests:
 - class: org.elasticsearch.xpack.inference.DefaultEndPointsIT
   method: testInferDeploysDefaultElser
   issue: https://github.com/elastic/elasticsearch/issues/114913
-- class: org.elasticsearch.upgrades.MultiVersionRepositoryAccessIT
-  method: testReadOnlyRepo
-  issue: https://github.com/elastic/elasticsearch/issues/114997
 - class: org.elasticsearch.upgrades.MultiVersionRepositoryAccessIT
   method: testCreateAndRestoreSnapshot
   issue: https://github.com/elastic/elasticsearch/issues/114998