Some of the tests in the test suite have proven to be more problematic
in adjusting to RF-rack-validity. Since we'd like to run as many tests
as possible with the `rf_rack_valid_keyspaces` configuration option
enabled, let's disable it in those. In the following commit, we'll enable
it by default.
This commit adds a test to verify that a query with long timeout
doesn't block ERM on failure. The motivation for the test is
fixing scylladb#21831.
This commit:
- add test_long_query_timeout_erm