WL#10885: Add/Extend mtr tests for Replication/GR variables with set persist

Affects: Server-8.0   —   Status: Complete   —   Priority: Medium

Currently SET PERSIST can set variables that are settable as SET GLOBAL and also
read-only variables.

Additionally RESET PERSIST can also be verified.

From Replication and Group Replication we must add tests to ensure this is covered, the list of
Replication and Group replication variables are listed here
https://dev.mysql.com/doc/refman/8.0/en/mysqld-option-tables.html

FR1 - Test must verify that SET/RESET PERSIST works properly for replication
      variables.

FR2 - Test must verify that SET/RESET PERSIST works properly for replication
      plugin variables.

FR3 - Test must verify that server starts with warning if plugin related
      variables are persisted and plugin is uninstalled.

FR4 - Test that invalid, incorrect values must not be persisted for core and
      group replication variables.