inflate: Use wider loads/stores with LSX

[Gelbpunkt]

Some pretty nice gains and AFAICT the last remaining place where we are missing LSX optimizations:

Benchmark 1 (107 runs): target/release/examples/uncompress-baseline rs silesia-small.tar.gz
  measurement          mean ± σ            min … max           outliers         delta
  wall_time          46.6ms ± 1.30ms    44.9ms … 50.3ms          4 ( 4%)        0%
  peak_rss           35.2MB ± 13.1MB    22.0MB … 56.3MB          0 ( 0%)        0%
  cpu_cycles         91.9M  ± 1.58M     89.3M  … 96.8M           2 ( 2%)        0%
  instructions        264M  ±    0       264M  …  264M           0 ( 0%)        0%
  cache_references   63.4M  ± 21.3K     63.2M  … 63.4M           1 ( 1%)        0%
  cache_misses       1.22M  ±  328K      982K  … 2.23M          11 (10%)        0%
Benchmark 2 (113 runs): target/release/examples/blogpost-uncompress rs silesia-small.tar.gz
  measurement          mean ± σ            min … max           outliers         delta
  wall_time          44.2ms ± 1.48ms    42.4ms … 47.5ms          0 ( 0%)        ⚡-  5.2% ±  0.8%
  peak_rss           36.0MB ± 13.9MB    22.8MB … 56.2MB          0 ( 0%)          +  2.2% ± 10.2%
  cpu_cycles         86.4M  ± 1.72M     83.9M  … 90.6M           0 ( 0%)        ⚡-  6.0% ±  0.5%
  instructions        255M  ±    0       255M  …  255M           0 ( 0%)        ⚡-  3.1% ±  0.0%
  cache_references   62.1M  ± 17.5K     62.0M  … 62.1M           4 ( 4%)        ⚡-  2.0% ±  0.0%
  cache_misses       1.10M  ±  206K      963K  … 1.88M           9 ( 8%)        ⚡-  9.7% ±  5.9%

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.

Flag	Coverage Δ
fuzz-compress	?
fuzz-decompress	?
test-aarch64-apple-darwin	89.15% <ø> (ø)
test-aarch64-unknown-linux-gnu	84.87% <ø> (-0.02%)	⬇️
test-i686-unknown-linux-gnu	84.38% <ø> (+0.01%)	⬆️
test-x86_64-apple-darwin	88.09% <ø> (-0.02%)	⬇️
test-x86_64-unknown-linux-gnu	90.44% <ø> (+0.01%)	⬆️

Flags with carried forward coverage won't be shown. Click here to find out more.

Files with missing lines	Coverage Δ
zlib-rs/src/inflate/writer.rs	90.67% <ø> (+0.37%)	⬆️

... and 3 files with indirect coverage changes

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[folkertdev]

Nice!