Support 8 and 16 bit integer data types with zfp codec

[LDeakin]

Support 8/16-bit integer types with the zfp codec through promotion to 32-bit in accordance with the zfp utility functions.

[codecov]

Codecov Report

Attention: Patch coverage is 82.21574% with 61 lines in your changes are missing coverage. Please review.

Project coverage is 81.95%. Comparing base (37cbeae) to head (58493ac).

Files	Patch %	Lines
src/array/codec/array_to_bytes/zfp/zfp_field.rs	27.27%	40 Missing ⚠️
src/array/codec/array_to_bytes/zfp.rs	93.82%	15 Missing ⚠️
...ay/codec/array_to_bytes/zfp/zfp_partial_decoder.rs	66.66%	6 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main      #20      +/-   ##
==========================================
+ Coverage   81.67%   81.95%   +0.28%     
==========================================
  Files         131      132       +1     
  Lines       19303    19528     +225     
==========================================
+ Hits        15765    16004     +239     
+ Misses       3538     3524      -14     

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