CICD.yml: Check that our coreutils does not break system

[oech3]

[github-actions[bot]]

GNU testsuite comparison:

Skipping an intermittent issue tests/tail/overlay-headers (passes in this run but fails in the 'main' branch)

[github-actions[bot]]

GNU testsuite comparison:

Congrats! The gnu test tests/cksum/cksum is no longer failing!

[oech3]

@cakebaker How to keep quality of tests after ubuntu 26.04 and ubuntu-latest runner adopted uutils/coreutils as default set?

[github-actions[bot]]

GNU testsuite comparison:

Skipping an intermittent issue tests/tail/overlay-headers (passes in this run but fails in the 'main' branch)

[codspeed-hq[bot]]

CodSpeed Performance Report

Merging #9634 will degrade performances by 3.91%

_{Comparing oech3:patch-7 (3a362f5) with main (64203e3)}

Summary

❌ 1 regression
✅ 126 untouched
⏩ 6 skipped[^skipped]

:warning: Please fix the performance issues or acknowledge them on CodSpeed.

Benchmarks breakdown

	Benchmark	BASE	HEAD	Change
❌	tsort_input_parsing_heavy[5000]	82.1 ms	85.5 ms	-3.91%
[^skipped]: 6 benchmarks were skipped, so the baseline results were used instead. If they were deleted from the codebase, click here and archive them to remove them from the performance reports.