ignore failing time formatter tests for LLVM 20.1.8

[Flamefire]

Fixes #23632

[Flamefire]

Test report by @Flamefire
Using easyblocks from PR(s) easybuilders/easybuild-easyblocks#3883
SUCCESS
Build succeeded for 1 out of 1 (1 easyconfigs in total)
n1609 - Linux RHEL 8.9 (Ootpa), x86_64, Intel(R) Xeon(R) Platinum 8470 (sapphirerapids), Python 3.9.18
See https://gist.github.com/Flamefire/c904f9a9de6bfe0769848c58178e142d for a full test report.

[boegel]

lgtm

[boegel]

Test report by @boegel
Using easyblocks from PR(s) easybuilders/easybuild-easyblocks#3881
SUCCESS
Build succeeded for 4 out of 4 (1 easyconfigs in total)
node3515.doduo.os - Linux RHEL 9.4, x86_64, AMD EPYC 7552 48-Core Processor (zen2), Python 3.9.18
See https://gist.github.com/boegel/7b5ac1ee8af513fd57bd30758575c39c for a full test report.

[boegel]

lgtm

[boegel]

Going in, thanks @Flamefire!

[boegel]

Test report by @boegel
Using easyblocks from PR(s) easybuilders/easybuild-easyblocks#3881
SUCCESS
Build succeeded for 1 out of 1 (1 easyconfigs in total)
node4205.shinx.os - Linux RHEL 9.4, x86_64, AMD EPYC 9654 96-Core Processor (zen4), Python 3.9.18
See https://gist.github.com/boegel/c671127d7fa90a6371588ade01457281 for a full test report.

edit: took 7h49min with --parallel=4 on an AMD Genoa system, using all available 16 cores seemed to result in "hang" during build (see also GDB backtrace on clangc++ process that has running for over 100min @ https://gist.github.com/boegel/00d5d8cf309bf058b434412caecdd4fc). Trying again with --parallel=8...

[boegel]

Test report by @boegel
Using easyblocks from PR(s) easybuilders/easybuild-easyblocks#3881
SUCCESS
Build succeeded for 1 out of 1 (1 easyconfigs in total)
node4205.shinx.os - Linux RHEL 9.4, x86_64, AMD EPYC 9654 96-Core Processor (zen4), Python 3.9.18
See https://gist.github.com/boegel/ba7b02c3661b10b512cacd3492fa56de for a full test report.

[boegel]

Test report by @boegel
Using easyblocks from PR(s) easybuilders/easybuild-easyblocks#3881
SUCCESS
Build succeeded for 1 out of 1 (1 easyconfigs in total)
node4205.shinx.os - Linux RHEL 9.4, x86_64, AMD EPYC 9654 96-Core Processor (zen4), Python 3.9.18
See https://gist.github.com/boegel/88404badd04f55fa49c2cb5db5dfa6eb for a full test report.