- Use sources which are actually published

- Update to upstream version v2.4
https://lore.kernel.org/linux-rt-users/20220708150017.13462-1-jkacur@redhat.com/
- Update to upstream version v2.3
https://lore.kernel.org/linux-rt-users/20211210184649.11084-1-jkacur@redhat.com/
- Remove old patch rt-tests-1.10-Makefile.patch, which installed
src/cyclictest/get_cyclictest_snapshot.8. Upstream guarded it with PYLIB in
3d1976b ("Makefile: manpages: only add get_cyclictest_snapshot if PYLIB")
but PYLIB should be defined due BuildRequires: python3-base
- Backport runtime fixes from upcomming release:
* 0001-cyclictest-Fix-threads-being-affined-even-when-a-isn.patch
* 0002-rt-tests-Remove-arbitrary-num-of-threads-limits.patch
* 0003-rt-tests-hackbench-Add-error-checking-to-connect-and.patch
* 0004-rt-tests-hwlatdetect-Update-to-integer-division.patch
- Use %autosetup (not having to add -p1 for patches)