Added support to cast NullArray to all other types

[flaneur2020]

this PR is a port of apache/arrow-rs#884

[codecov]

Codecov Report

Merging #589 (0b607ae) into main (e9d618c) will decrease coverage by 0.02%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##             main     #589      +/-   ##
==========================================
- Coverage   78.99%   78.97%   -0.03%     
==========================================
  Files         399      400       +1     
  Lines       24752    24831      +79     
==========================================
+ Hits        19554    19611      +57     
- Misses       5198     5220      +22     

Impacted Files	Coverage Δ
src/compute/cast/mod.rs	93.91% <100.00%> (+2.57%)	⬆️
tests/it/compute/cast.rs	99.37% <100.00%> (+0.01%)	⬆️
src/io/ipc/read/array/dictionary.rs	42.10% <0.00%> (-7.90%)	⬇️
src/io/ipc/read/common.rs	80.32% <0.00%> (-6.41%)	⬇️
src/datatypes/schema.rs	37.93% <0.00%> (-5.82%)	⬇️
src/io/ipc/read/array/fixed_size_list.rs	25.00% <0.00%> (-5.44%)	⬇️
src/io/ipc/read/array/list.rs	43.75% <0.00%> (-4.64%)	⬇️
src/array/growable/mod.rs	21.56% <0.00%> (-4.63%)	⬇️
src/io/ipc/read/array/map.rs	25.00% <0.00%> (-4.04%)	⬇️
src/io/ipc/read/array/struct_.rs	92.85% <0.00%> (-3.44%)	⬇️
... and 36 more

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[jorgecarleitao]

Thanks a lot, @flaneur2020 !