don't do 5.3-0, just have the migration be part of 5.2-1

src/backend/distributed/citus--5.1-8--5.2-1.sql

@@ -1,3 +1,5 @@
-/* citus--5.1-8--5.2-1.sql */
+/* citus--5.2-1--5.3-0.sql */
+
+ALTER TABLE pg_catalog.pg_dist_shard
+DROP COLUMN IF EXISTS shardalias;
 
-/* empty, but required to update the extension version */

src/backend/distributed/citus--5.2-1--5.3-0.sql

@@ -1,5 +0,0 @@
-/* citus--5.2-1--5.3-0.sql */
-
-ALTER TABLE pg_catalog.pg_dist_shard
-DROP COLUMN IF EXISTS shardalias;
-