Bug#37083943: The V$OPTION component should not be collecting

group_replication_group_name anymore when storing usage data

Removed the reading of the group_replication_group_name system variable
by the option_tracker component.
Updated the doxygen about this.
Removed setting the variable to some weird value during tests.
Re-recorded the affected test result.
Reading the row updates now ignores the cluster ID too.

Change-Id: I76eba54d52931c3ba7b7a892bac7ab400eb1eb8d

include/mysql/components/services/mysql_option_tracker.h

@@ -90,9 +90,7 @@ END_SERVICE_DEFINITION(mysql_option_tracker_option)
   Sets usage data for a given option.
   Internally stores into the system table.
 
-  It gets the value for cluster_id from the system variable
-  group_replication_group_name (defined by the GR plugin).
-  If the plugin is not installed it uses empty string.
+  Cluster ID is set to empty.
 
   It gets the value for server_id from the system variable
   server_uuid.