Add list membership API and uint64 hash utilities

[bretambrose]

• List membership check function to safely remove when something may or may not be in a list
• uint64 hash utility functions

By submitting this pull request, I confirm that my contribution is made under the terms of the Apache 2.0 license.

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 0% with 4 lines in your changes are missing coverage. Please review.

Project coverage is 83.06%. Comparing base (656a2ef) to head (c7f3219).

Files	Patch %	Lines
source/hash_table.c	0.00%	4 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1103      +/-   ##
==========================================
- Coverage   83.11%   83.06%   -0.06%     
==========================================
  Files          56       56              
  Lines        5764     5768       +4     
==========================================
  Hits         4791     4791              
- Misses        973      977       +4     

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