fix: add current low ut coverage class to jacocoExclusions to unblock CI (#4108)

Signed-off-by: Sicheng Song <[email protected]>
(cherry picked from commit a51e2a8)

Author: b4sjoo

plugin/build.gradle

@@ -384,7 +384,9 @@ List<String> jacocoExclusions = [
         'org.opensearch.ml.jobs.processors.MLStatsJobProcessor',
         'org.opensearch.ml.jobs.processors.MLJobProcessor',
         'org.opensearch.ml.action.memorycontainer.memory.TransportAddMemoriesAction',
-        'org.opensearch.ml.action.memorycontainer.memory.TransportAddMemoriesAction.*'
+        'org.opensearch.ml.action.memorycontainer.memory.TransportAddMemoriesAction.*',
+        'org.opensearch.ml.rest.RestMLDeleteMemoryAction',
+        'org.opensearch.ml.rest.RestMLDeleteMemoryAction.*'
 ]
 
 jacocoTestCoverageVerification {