Resolves: rhbz#2011877
Enabled all tests:
- Copied script from RHEL 8.6.0 branch.
- Added nightly RHEL 9.0 repositories.
- Don't install EPEL for RHEL 9.0: Koji and Ansible aren't required for
any of the enabled tests.
Unmount /tmp before running tests:
/tmp is too small to contain the results of image building tests.
Unmounting the partition makes it part of the underlying root partition,
which is much larger.
This commit also copies gating from RHEL 8. The integration test is currently
disabled because there's not much to test on RHEL 9 yet.
Also, the patch is removed, this was probably forgotten in Fedora
dist-git.
Related: rhbz#1972427
