MDEV-13549 Re-enable tests MW-328A, MW-328B, MW-328C and MW-329

These tests were also subject to error "Wrong usage of mutex
'LOCK_wsrep_thd' and 'LOCK_thd_kill'".

mysql-test/suite/galera/disabled.def

@@ -13,7 +13,6 @@ MW-336 : MDEV-13549 Galera test failures
 galera_gra_log : MDEV-13549 Galera test failures
 galera_flush_local : MDEV-13549 Galera test failures
 galera_flush :  MDEV-13549 Galera test failures
-MW-329 : MDEV-13549 Galera test failures
 galera_account_management : MariaDB 10.0 does not support ALTER USER
 galera_binlog_row_image : MariaDB 10.0 does not support binlog_row_image
 galera_binlog_rows_query_log_events: MariaDB does not support binlog_rows_query_log_events
@@ -53,10 +52,6 @@ galera_pc_ignore_sb : MDEV-13549 Galera test failures 10.1
 galera_lock_table : MDEV-13549 Galera test failures 10.1
 MW-284 : MDEV-13549 Galera test failures 10.1
 galera_as_slave : MDEV-13549 Galera test failures 10.1
-MW-328C : MDEV-13549 Galera test failures 10.1
-MW-328A : MDEV-13549 Galera test failures 10.1
-MW-328B : MDEV-13549 Galera test failures 10.1
-MW-328 : MDEV-13549 Galera test failures 10.1
 galera_suspend_slave : MDEV-13549 Galera test failures 10.1
 galera_gtid : MDEV-13549 Galera test failures 10.1
 galera_gtid_slave : MDEV-13549 Galera test failures 10.1