Described how to run part of the tests

[jorgecarleitao]

Closed #524

Also removed leftover test that has been generalized into tests.

[codecov]

Codecov Report

Merging #762 (44959e1) into main (1c6e8bd) will increase coverage by 0.00%.
The diff coverage is n/a.

@@           Coverage Diff           @@
##             main     #762   +/-   ##
=======================================
  Coverage   71.02%   71.03%           
=======================================
  Files         315      315           
  Lines       16950    16950           
=======================================
+ Hits        12039    12040    +1     
+ Misses       4911     4910    -1     

Impacted Files	Coverage Δ
src/io/parquet/read/schema/metadata.rs	74.19% <ø> (ø)
src/io/avro/read/schema.rs	55.91% <0.00%> (+1.07%)	⬆️

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