Revert "Disable new added 2PC test as failing in CI."

This reverts commit 1a27788edfd2163cbfcb1dc30c5eb870eac77181. As should be
passing now since FTS using uninitialized variable `fts_status` causing the
failure has been fixed now.

src/test/isolation2/isolation2_schedule

@@ -7,7 +7,7 @@ test: resource_queue
 test: alter_blocks_for_update_and_viceversa
 test: reader_waits_for_lock
 test: drop_rename
-#test: master_panic_after_phase1_commit
+test: master_panic_after_phase1_commit
 
 test: setup
 # Tests on Append-Optimized tables (row-oriented).