coreutils: strip errno

[oech3]

strip (os error N) from --version >/dev/full, etc...

[github-actions]

GNU testsuite comparison:

GNU test failed: tests/misc/io-errors. tests/misc/io-errors is passing on 'main'. Maybe you have to rebase?
Skipping an intermittent issue tests/date/resolution (passes in this run but fails in the 'main' branch)
Skipping an intermittent issue tests/pr/bounded-memory (passes in this run but fails in the 'main' branch)
Note: The gnu test tests/cp/link-heap is now being skipped but was previously passing.
Note: The gnu test tests/printf/printf-surprise is now being skipped but was previously passing.

[xtqqczze]

In future, could you minimise the diff by avoiding making unnecessary changes to type qualification.

[xtqqczze]

These changes make error messages more consistent with GNU coreutils.

[oech3]

Targets of diff are mostly same lines

[oech3]

GNU's test suite stated extracting OS provided err messages and use it. So many tests might fail in the future by (os error N).

[github-actions]

GNU testsuite comparison:

Skip an intermittent issue tests/pr/bounded-memory (fails in this run but passes in the 'main' branch)
Congrats! The gnu test tests/cp/link-heap is now passing!
Note: The gnu test tests/misc/write-errors was skipped on 'main' but is now failing.