Avoid zeroed allocation in reading avro

[jorgecarleitao]

No description provided.

[codecov]

Codecov Report

Merging #1127 (31715ed) into main (81ab424) will increase coverage by 0.00%.
The diff coverage is 92.30%.

@@           Coverage Diff           @@
##             main    #1127   +/-   ##
=======================================
  Coverage   83.37%   83.38%           
=======================================
  Files         367      367           
  Lines       35574    35579    +5     
=======================================
+ Hits        29661    29668    +7     
+ Misses       5913     5911    -2     

Impacted Files	Coverage Δ
src/io/avro/read_async/block.rs	87.75% <80.00%> (-1.38%)	⬇️
src/io/avro/read/block.rs	69.09% <100.00%> (ø)
src/io/avro/read/util.rs	96.29% <100.00%> (+0.14%)	⬆️
src/io/avro/read_async/metadata.rs	96.87% <100.00%> (+0.10%)	⬆️
src/io/ipc/read/reader.rs	96.38% <0.00%> (+0.36%)	⬆️
src/bitmap/immutable.rs	81.48% <0.00%> (+0.61%)	⬆️
src/bitmap/utils/slice_iterator.rs	98.78% <0.00%> (+1.21%)	⬆️

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