MDEV-21601 : Cleanup Galera disabled tests

* Remove those tests that will not be supported on that release.
* Make sure that correct tests are disabled and have MDEVs
* Sort test names

This should not be merged upwards.

Author: Jan Lindström

mysql-test/suite/galera/disabled.def

@@ -15,21 +15,14 @@ MW-328A : MDEV-21483 galera.MW-328A galera.MW-328B
 MW-328B : MDEV-21483 galera.MW-328A galera.MW-328B
 MW-329 : MDEV-19962 Galera test failure on MW-329
 galera.galera_defaults : MDEV-21494 Galera test sporadic failure on galera.galera_defaults
-galera_account_management : MariaDB 10.0 does not support ALTER USER
-galera_as_master_gtid : Requires MySQL GTID
-galera_as_master_gtid_change_master : Requires MySQL GTID
 galera_as_slave_gtid_myisam : MDEV-21421 galera.galera_as_slave_gtid_myisam
-galera_as_slave_preordered : wsrep-preordered feature not merged to MariaDB
 galera_as_slave_replication_bundle : MDEV-15785 OPTION_GTID_BEGIN is set in Gtid_log_event::do_apply_event()
 galera_autoinc_sst_mariabackup : Known issue, may require porting MDEV-17458 from later versions
-galera_binlog_rows_query_log_events: MariaDB does not support binlog_rows_query_log_events
 galera_binlog_stmt_autoinc : MDEV-19959 Galera test failure on galera_binlog_stmt_autoinc	
-galera_flush :  MariaDB does not have global.thread_statistics
 galera_gcache_recover_manytrx : MDEV-18834 Galera test failure
 galera_ist_mariabackup : MDEV-18829 test leaves port open
 galera_ist_progress : MDEV-15236 fails when trying to read transfer status
 galera_load_data : MDEV-19968 galera.galera_load_data
-galera_migrate : MariaDB does not support START SLAVE USER
 galera_parallel_autoinc_largetrx : MDEV-20916 galera.galera_parallel_autoinc_largetrx
 galera_parallel_simple : MDEV-20318 galera.galera_parallel_simple fails	
 galera_shutdown_nonprim : MDEV-21493 galera.galera_shutdown_nonprim