- Move systemd-repart from experimental to udev.

- Add 0001-Drop-support-for-efivar-SystemdOptions.patch (bsc#1220338)
Upstream deprecated it and plan to drop it in the future.
Let's get ahead and drop it now as this feature is unlikely to be used on SUSE
distros and it might be used to gain access to encrypted SLEM systems with
unattended disk unlock and with secure boot disabled.

- The following patches have been merged into SUSE/v255 branch hence removed
from the OBS project.
5006-cgroup-Add-EffectiveMemoryMax-EffectiveMemoryHigh-an.patch
5007-test-Convert-rlimit-test-to-subtest-of-generic-limit.patch
5008-test-Add-effective-cgroup-limits-testing.patch
5009-cgroup-Restrict-effective-limits-with-global-resourc.patch
5010-cgroup-Rename-effective-limits-internal-table.patch
- Import commit 56b53b17bcd8311dfb53f05b359b2812593883ab
56b53b17bc cgroup: Rename effective limits internal table (jsc#PED-5659)
7c9202317c cgroup: Restrict effective limits with global resource provision (jsc#PED-5659)
da858e68eb test: Add effective cgroup limits testing (jsc#PED-5659)
2f013357a5 test: Convert rlimit test to subtest of generic limit testing (jsc#PED-5659)
0a3ea7f367 cgroup: Add EffectiveMemoryMax=, EffectiveMemoryHigh= and EffectiveTasksMax= properties (jsc#PED-5659)

- Drop split_usr build conditional since both split-usr and unmerged-usr
supports have been removed since v255.
- Don't use the "Patch:" directive with a suffix number as since the suffix
doesn't serve any purpose.