Mute unstable tests (#12421)

Author: naspirato

.github/config/muted_ya.txt

@@ -65,6 +65,8 @@ ydb/core/tx/datashard/ut_incremental_backup IncrementalBackup.ComplexRestoreBack
 ydb/core/tx/schemeshard/ut_move_reboots TSchemeShardMoveRebootsTest.WithData
 ydb/core/tx/schemeshard/ut_move_reboots TSchemeShardMoveRebootsTest.WithDataAndPersistentPartitionStats
 ydb/core/tx/schemeshard/ut_pq_reboots TPqGroupTestReboots.AlterWithReboots-PQConfigTransactionsAtSchemeShard-false
+ydb/core/tx/schemeshard/ut_pq_reboots TPqGroupTestReboots.CreateAlter-PQConfigTransactionsAtSchemeShard-true
+ydb/core/tx/schemeshard/ut_pq_reboots TPqGroupTestReboots.CreateAlterDropPqGroupWithReboots-PQConfigTransactionsAtSchemeShard-true
 ydb/core/tx/schemeshard/ut_split_merge TSchemeShardSplitBySizeTest.Merge1KShards
 ydb/core/tx/tiering/ut ColumnShardTiers.TTLUsage
 ydb/core/tx/tx_proxy/ut_ext_tenant TExtSubDomainTest.CreateTableInsideAndAlterDomainAndTable-AlterDatabaseCreateHiveFirst-false