cksum: Bring back blake3 algorithm

[RenjiSann]

Fix #10002

[github-actions]

GNU testsuite comparison:

Skip an intermittent issue tests/date/date-locale-hour (fails in this run but passes in the 'main' branch)
Skipping an intermittent issue tests/pr/bounded-memory (passes in this run but fails in the 'main' branch)
Skipping an intermittent issue tests/tty/tty-eof (passes in this run but fails in the 'main' branch)
Note: The gnu test tests/cut/bounded-memory is now being skipped but was previously passing.
Note: The gnu test tests/tail/pipe-f is now being skipped but was previously passing.

[codspeed-hq]

Merging this PR will degrade performance by 99.88%

❌ 2 regressed benchmarks
✅ 298 untouched benchmarks
⏩ 46 skipped benchmarks¹

⚠️ Please fix the performance issues or acknowledge them on CodSpeed.

Performance Changes

	Mode	Benchmark	BASE	HEAD	Efficiency
❌	Simulation	cksum_blake3	116.3 µs	93,223.6 µs	-99.88%
❌	Memory	cksum_blake3	33.9 KB	43.5 KB	-21.95%

---

_{Comparing RenjiSann:cksum-blake3 (3387ee5) with main (0f38c81)}

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. ↩

[oech3]

CodSpeed is invalid since it is based on a bunch of clap error.

[github-actions]

GNU testsuite comparison:

Skipping an intermittent issue tests/pr/bounded-memory (passes in this run but fails in the 'main' branch)
Skipping an intermittent issue tests/tty/tty-eof (passes in this run but fails in the 'main' branch)

[xtqqczze]

Suggested change

	digest: Default::default(),
	digest: blake3::Hasher::default(),