mv: Use rustc-hash

[oech3]

No description provided.

[oech3]

mv_multiple_to_dir
+2% 12.6 ms -> 12.3 ms

mv_force_overwrite
0% 142 ms -> 141.9 ms

Is mv bounded by I/O perf too?

[github-actions]

GNU testsuite comparison:

GNU test failed: tests/date/date-locale-hour. tests/date/date-locale-hour is passing on 'main'. Maybe you have to rebase?
GNU test failed: tests/tail/truncate. tests/tail/truncate is passing on 'main'. Maybe you have to rebase?

[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!
Note: The gnu test tests/printf/printf-surprise is now being skipped but was previously passing.

[github-actions]

GNU testsuite comparison:

Skipping an intermittent issue tests/tail/follow-name (passes in this run but fails in the 'main' branch)
Congrats! The gnu test tests/cut/bounded-memory is no longer failing!
Note: The gnu test tests/seq/seq-epipe is now being skipped but was previously passing.

[codspeed-hq]

Merging this PR will not alter performance

✅ 286 untouched benchmarks
⏩ 40 skipped benchmarks¹

---

_{Comparing oech3:mv-fx (ed00cec) with main (ce08ea0)}

Footnotes

1. 40 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:

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

[cakebaker]

Thanks!