Unmute GlobalCheckpointSyncActionIT (elastic#116037)

Closes elastic#111124

Author: mark-vieira

muted-tests.yml

@@ -20,8 +20,6 @@ tests:
 - class: org.elasticsearch.nativeaccess.VectorSystemPropertyTests
   method: testSystemPropertyDisabled
   issue: https://github.com/elastic/elasticsearch/issues/110949
-- class: org.elasticsearch.multi_node.GlobalCheckpointSyncActionIT
-  issue: https://github.com/elastic/elasticsearch/issues/111124
 - class: org.elasticsearch.packaging.test.DockerTests
   method: test021InstallPlugin
   issue: https://github.com/elastic/elasticsearch/issues/110343