Fix binary swap test failure on PG version bump

The binary swap test compares pg_dump outputs between baseline and
current builds using a plain diff. When upgrading the PG kernel minor
version (e.g. 14.4 to 14.5), the "-- Dumped from database version"
comment line in pg_dump output differs between the two builds, causing
a false test failure.

Add the `-I` flag with a regex pattern to the diff command in
diff_dumps.sql so that comment-only version lines are ignored during
comparison. This preserves detection of any real catalog, schema, or
data incompatibilities while allowing PG minor version bumps without
breaking the binary swap CI check.

Author: tuhaihe

src/test/binary_swap/expected/diff_dumps.out

@@ -1 +1 @@
-\! diff dump_other.sql dump_current.sql
+\! diff -I '^-- Dumped from database version' dump_other.sql dump_current.sql

src/test/binary_swap/sql/diff_dumps.sql

@@ -1 +1 @@
-\! diff dump_other.sql dump_current.sql
+\! diff -I '^-- Dumped from database version' dump_other.sql dump_current.sql