deps: replace ahash with foldhash

[xtqqczze]

Drop ahash dependency in favor of hashbrown's default hasher.

• ahash can be slow as it is reliant on hardware support for AES-based instructions.
• ahash uses different algorithms depending on whether there is hardware support for AES-based instructions, fallback algorithm is slower
• ahash is not well maintained: Drop aHash dependency in favor of hashbrown's choice of default hasher pascalkuthe/imara-diff#17 (comment)
• we already use foldhash (as a transitive dependency) so this is one less dependency

https://codspeed.io/uutils/coreutils/branches/xtqqczze%3Adeps%2Ffoldhash

cc: @oech3

[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?
GNU test failed: tests/tail/tail-n0f. tests/tail/tail-n0f is passing on 'main'. Maybe you have to rebase?
Skipping an intermittent issue tests/date/date-locale-hour (passes in this run but fails in the 'main' branch)
Skipping an intermittent issue tests/tail/follow-name (passes in this run but fails in the 'main' branch)
Skipping an intermittent issue tests/tail/symlink (passes in this run but fails in the 'main' branch)

[sylvestre]

you wrote:

we already use foldhash so this is one less dependency

so, why do you have to add it here?

[oech3]

because it is transitive dep

[xtqqczze]

@oech3 has binary size reduced?

[oech3]

I cannot check soon, but OK to merge as perf gains 1%.