Rename multi_metadata_snapshot to multi_metadata_sync to make it include future mx metadata syncing regression tests

src/test/regress/expected/multi_metadata_sync.out

@@ -1,7 +1,8 @@
 --
--- MULTI_METADATA_SNAPSHOT
+-- MULTI_METADATA_SYNC
 --
--- Tests for metadata snapshot functions.
+-- Tests for metadata snapshot functions, metadata syncing functions and propagation of
+-- metadata changes to MX tables.
 ALTER SEQUENCE pg_catalog.pg_dist_shardid_seq RESTART 1310000;
 ALTER SEQUENCE pg_catalog.pg_dist_jobid_seq RESTART 1310000;
 SELECT nextval('pg_catalog.pg_dist_shard_placement_placementid_seq') AS last_placement_id

src/test/regress/multi_schedule

@@ -139,7 +139,7 @@ test: multi_data_types
 test: multi_repartition_udt
 test: multi_repartitioned_subquery_udf
 test: multi_modifying_xacts
-test: multi_metadata_snapshot
+test: multi_metadata_sync
 test: multi_transaction_recovery
 
 # ---------

src/test/regress/sql/multi_metadata_sync.sql

@@ -1,8 +1,9 @@
 --
--- MULTI_METADATA_SNAPSHOT
+-- MULTI_METADATA_SYNC
 --
 
--- Tests for metadata snapshot functions.
+-- Tests for metadata snapshot functions, metadata syncing functions and propagation of
+-- metadata changes to MX tables.
 
 
 ALTER SEQUENCE pg_catalog.pg_dist_shardid_seq RESTART 1310000;