Adding temporary root owned file in tmp folder for eperm test

[ChrisDryden]

This test is passing locally and failing on the build fleet because there's no files in the /tmp folder that are not owned by the runner of the test. Adding this to the build-gnu step to create this file so that there's something that the test can use and pass.

fail-eperm.xpl: couldn't find a file not owned by you
in any of the following directories:
/tmp /var/tmp /usr/tmp
...so, skipping this test
SKIP: tests/rm/fail-eperm.xpl

[ChrisDryden]

Looks like the test passed now 🥳 I rebased to get the change that shows when something turns from skipped to pass so should be getting that comment soon

[github-actions]

GNU testsuite comparison:

Skipping an intermittent issue tests/misc/tee (passes in this run but fails in the 'main' branch)
Congrats! The gnu test tests/rm/fail-eperm is now passing!

[github-actions]

GNU testsuite comparison:

Skip an intermittent issue tests/tail/overlay-headers (fails in this run but passes in the 'main' branch)
Skipping an intermittent issue tests/misc/tee (passes in this run but fails in the 'main' branch)
Congrats! The gnu test tests/rm/fail-eperm is now passing!

[ChrisDryden]

A more concise implementation is here: #9531

[oech3]

Let's backport #9531 (comment) for simplicity at coreutils > 9.9 instead.

[oech3]

This test was removed(merged to another test coreutils/coreutils@ffbd8c4) by @pixelb .

What should we do at here in the case at here?