pathchk: readable error message without scrolling terminal

[oech3]

We cannot read error message before long path without scrolling.
Closes #13153

[codspeed-hq]

Merging this PR will not alter performance

✅ 331 untouched benchmarks
⏩ 46 skipped benchmarks¹

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_{Comparing oech3:pathchk-long (34cefd8) with main (a1763bf)}

Footnotes

1. 46 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. ↩

[github-actions]

GNU testsuite comparison:

Skip an intermittent issue tests/tail/symlink (fails in this run but passes in the 'main' branch)
Congrats! The gnu test tests/cp/sparse-to-pipe is no longer failing!
Note: The gnu test tests/misc/write-errors was skipped on 'main' but is now failing.