Made Avro read API use Block and CompressedBlock

[jorgecarleitao]

Cleans the public API to read from Avro by using the new Block and CompressedBlock API designed as part of #690

See changes to the example to understand how to migrate.

[codecov]

Codecov Report

Merging #698 (98f3082) into main (45e72e9) will decrease coverage by 0.00%.
The diff coverage is 76.19%.

@@            Coverage Diff             @@
##             main     #698      +/-   ##
==========================================
- Coverage   70.36%   70.35%   -0.01%     
==========================================
  Files         308      308              
  Lines       16808    16816       +8     
==========================================
+ Hits        11827    11831       +4     
- Misses       4981     4985       +4     

Impacted Files	Coverage Δ
src/io/avro/write/block.rs	66.66% <ø> (+3.03%)	⬆️
src/io/avro/write/mod.rs	91.30% <ø> (ø)
src/io/avro/read/block.rs	59.45% <62.50%> (-11.97%)	⬇️
src/io/avro/read_async/block.rs	78.12% <76.92%> (-4.64%)	⬇️
src/io/avro/read/decompress.rs	81.81% <85.71%> (+1.17%)	⬆️
src/io/avro/mod.rs	66.66% <100.00%> (+66.66%)	⬆️
src/io/avro/read/deserialize.rs	67.22% <100.00%> (+0.56%)	⬆️
src/io/avro/read/mod.rs	80.00% <100.00%> (-1.25%)	⬇️
src/io/parquet/read/nested_utils.rs	78.43% <0.00%> (+0.98%)	⬆️
... and 1 more

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