feat: optimize lock critical section

[MrCroxx]

What's changed and what's your intention?

Please explain IN DETAIL what the changes are in this PR and why they are needed. :D

• Cloning and dropping cache entry no longer requires locking (ref > 0).
• Use rwlock for cache eviction algorighm without mutable acquire op.
• Use slab to replace object pool optimization.
• Refine abstractions.

Checklist

• I have written the necessary rustdoc comments
• I have added the necessary unit tests and integration tests
• I have passed make all (or make fast instead if the old tests are not modified) in my local environment.

Related issues or PRs (optional)

close #779

[codecov]

Codecov Report

Attention: Patch coverage is 80.99839% with 236 lines in your changes missing coverage. Please review.

Files with missing lines	Patch %	Lines
foyer-memory/src/eviction/lfu.rs	63.01%	54 Missing ⚠️
foyer-memory/src/slab.rs	79.16%	30 Missing ⚠️
foyer-memory/src/eviction/lru.rs	80.88%	26 Missing ⚠️
foyer-memory/src/raw.rs	89.68%	26 Missing ⚠️
foyer-memory/src/eviction/s3fifo.rs	82.99%	25 Missing ⚠️
foyer-memory/src/record.rs	84.86%	23 Missing ⚠️
foyer-memory/src/cache.rs	72.88%	16 Missing ⚠️
foyer-common/src/scope.rs	36.84%	12 Missing ⚠️
foyer-intrusive/src/dlist.rs	68.75%	10 Missing ⚠️
foyer-memory/src/eviction/fifo.rs	80.00%	8 Missing ⚠️
... and 2 more

Files with missing lines	Coverage Δ
foyer-intrusive/src/adapter.rs	88.88% <100.00%> (ø)
foyer-memory/src/indexer/hash_table.rs	100.00% <100.00%> (ø)
foyer-memory/src/indexer/sentry.rs	100.00% <100.00%> (ø)
foyer/src/hybrid/builder.rs	95.37% <100.00%> (+0.22%)	⬆️
foyer/src/hybrid/cache.rs	82.33% <100.00%> (ø)
foyer/src/hybrid/writer.rs	100.00% <100.00%> (ø)
foyer-memory/src/eviction/mod.rs	0.00% <0.00%> (ø)
foyer-memory/src/sync.rs	90.32% <90.32%> (ø)
foyer-memory/src/eviction/fifo.rs	85.86% <80.00%> (-4.52%)	⬇️
foyer-intrusive/src/dlist.rs	75.00% <68.75%> (-1.46%)	⬇️
... and 8 more

... and 2 files with indirect coverage changes

[MrCroxx]

Duplicated with #785