fix clippy

[PSeitz]

• fix clippy
• fix clippy fastfield codecs
• fix clippy bitpacker
• fix clippy common
• fix clippy stacker
• fix clippy sstable

unnecessary cast now in clippy

[codecov-commenter]

Codecov Report

Merging #1725 (76c2c66) into main (a2cf6a7) will decrease coverage by 0.00%.
The diff coverage is 97.43%.

@@            Coverage Diff             @@
##             main    #1725      +/-   ##
==========================================
- Coverage   94.06%   94.06%   -0.01%     
==========================================
  Files         262      262              
  Lines       50015    49994      -21     
==========================================
- Hits        47047    47026      -21     
  Misses       2968     2968              

Impacted Files	Coverage Δ
src/indexer/merger.rs	98.84% <50.00%> (ø)
fastfield_codecs/src/compact_space/mod.rs	96.92% <90.90%> (+0.13%)	⬆️
bitpacker/src/bitpacker.rs	99.00% <100.00%> (-1.00%)	⬇️
bitpacker/src/blocked_bitpacker.rs	95.12% <100.00%> (ø)
common/src/bitset.rs	98.48% <100.00%> (ø)
fastfield_codecs/src/blockwise_linear.rs	99.21% <100.00%> (ø)
...ld_codecs/src/compact_space/build_compact_space.rs	94.73% <100.00%> (ø)
src/aggregation/bucket/histogram/histogram.rs	99.56% <100.00%> (ø)
src/aggregation/intermediate_agg_result.rs	98.43% <100.00%> (ø)
src/aggregation/mod.rs	98.87% <100.00%> (ø)
... and 33 more

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