refactor: use bytesize for foyer-bench

[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

As title.

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)

#689

[MrCroxx]

New benchmark script:

cargo build --release --features jemalloc && PATH=/home/mrcroxx/.local/bin:$PATH RUST_BACKTRACE=1 RUST_LOG=info flamegraph -- ./target/release/foyer-bench --file /dev/nvme2n1 --mem 64MiB --disk 100GiB --region-size 64MiB --get-range 100000 --flushers 4 --reclaimers 4 --time 60 --writers 256 --w-rate 4MiB --admission-rate-limit 500MiB --readers 32 --r-rate 32MiB --metrics --warm-up 2 --runtime separated --user-runtime-worker-threads 8 --read-runtime-worker-threads 8 --write-runtime-worker-threads 4 --read-runtime-max-blocking-threads 8 --write-runtime-max-blocking-threads 4

[codecov]

Codecov Report

Attention: Patch coverage is 58.82353% with 14 lines in your changes missing coverage. Please review.

Files with missing lines	Patch %	Lines
foyer-bench/src/main.rs	58.82%	14 Missing ⚠️

Files with missing lines	Coverage Δ
foyer-bench/src/main.rs	66.11% <58.82%> (ø)