Fixed error in writing ListArray to parquet

[jorgecarleitao]

When writing optional values to a required field, we must be mindful about the field nullability. Likewise, when writing required values to an optional field, we must ignore validity. Not doing this results in an incorrect file. This PR makes the implementation aware of the field nullability.

Closes #983 and #977

[codecov]

Codecov Report

Merging #984 (10a2006) into main (7d0908f) will decrease coverage by 0.05%.
The diff coverage is 67.00%.

@@            Coverage Diff             @@
##             main     #984      +/-   ##
==========================================
- Coverage   71.40%   71.35%   -0.06%     
==========================================
  Files         357      357              
  Lines       19728    19770      +42     
==========================================
+ Hits        14086    14106      +20     
- Misses       5642     5664      +22     

Impacted Files	Coverage Δ
src/io/parquet/write/dictionary.rs	63.06% <44.44%> (+0.56%)	⬆️
src/io/parquet/write/mod.rs	58.62% <57.35%> (+0.11%)	⬆️
src/io/parquet/write/levels.rs	80.00% <66.21%> (-17.06%)	⬇️
src/io/parquet/write/row_group.rs	84.84% <77.77%> (-0.45%)	⬇️
src/io/parquet/write/binary/basic.rs	56.17% <100.00%> (ø)
src/io/parquet/write/binary/nested.rs	86.36% <100.00%> (ø)
src/io/parquet/write/boolean/basic.rs	97.50% <100.00%> (ø)
src/io/parquet/write/boolean/nested.rs	86.36% <100.00%> (ø)
src/io/parquet/write/fixed_len_bytes.rs	100.00% <100.00%> (ø)
src/io/parquet/write/primitive/basic.rs	84.21% <100.00%> (ø)
... and 7 more

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