CICD: Drop a duplicated test producing huge caches

[oech3]

test_separately is a duplicated of

coreutils/.github/workflows/CICD.yml

Lines 852 to 861 in adf36f9

	- name: Test
	if: matrix.job.skip-tests != true
	shell: bash
	run: |
	## Test
	${{ steps.vars.outputs.CARGO_CMD }} ${{ steps.vars.outputs.CARGO_CMD_OPTIONS }} test --target=${{ matrix.job.target }} \
	${{ steps.vars.outputs.CARGO_TEST_OPTIONS}} ${{ matrix.job.cargo-options }} ${{ steps.vars.outputs.CARGO_FEATURES_OPTION }} ${{ steps.vars.outputs.CARGO_DEFAULT_FEATURES_OPTION }} \
	${{ steps.dep_vars.outputs.CARGO_UTILITY_LIST_OPTIONS }} -p coreutils
	env:
	RUST_BACKTRACE: "1"

existing just for better appearance. But it is inefficient (both for time and caching).

Closes #11002 too. (Process related issue is unrelated with blocking regression)

[github-actions]

GNU testsuite comparison:

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

[github-actions]

GNU testsuite comparison:

Skipping an intermittent issue tests/pr/bounded-memory (passes in this run but fails in the 'main' branch)
Congrats! The gnu test tests/cut/bounded-memory is no longer failing!

[codspeed-hq]

Merging this PR will improve performance by 4.66%

⚡ 1 improved benchmark
✅ 287 untouched benchmarks
⏩ 38 skipped benchmarks¹

Performance Changes

	Mode	Benchmark	BASE	HEAD	Efficiency
⚡	Simulation	cp_large_file[16]	395.2 µs	377.6 µs	+4.66%

---

_{Comparing oech3:patch-17 (44023a7) with main (289d701)}

Footnotes

1. 38 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. ↩