So that we can run the tests that require fake_fdw by using minimal
schedule too.
Also move multi_create_fdw.sql up in multi_1_schedule to make it
available to more tests.
This change reduces the setup time of our minimal schedules in two ways:
1. Don't run `multi_cluster_managament`, but instead run a much smaller
sql file with almost the same results. `multi_cluster_management`
adds and removes lots of nodes and tests all kinds of failure
scenarios. This is not needed for the minimal schedules. The only
reason we were using it there was to get a working cluster of the
layout that the tests expected. The new `minimal_cluster_management`
test achieves this with much less work, going from ~2s to ~0.5s.
2. Parallelize a bit more of the helper tests.
Test ALTER ROLE doesn't deadlock when coordinator added, or propagate from mx workers
Consolidate wait_until_metadata_sync & verify_metadata to multi_test_helpers
Onur Tirtir
Jelte Fennema
Onder Kalaci
Halil Ozan Akgul
Sait Talha Nisanci
Philip Dubé