Add utility hash functions

[manh9203]

This PR added these utility hash functions:

• md5
• sha256
• hash (Murmurhash64)

[codecov]

Codecov Report

Attention: Patch coverage is 86.41975% with 11 lines in your changes are missing coverage. Please review.

Project coverage is 92.26%. Comparing base (d946982) to head (2f898b9).
Report is 6 commits behind head on master.

❗ Current head 2f898b9 differs from pull request most recent head c5e7e8e. Consider uploading reports for the commit c5e7e8e to get more accurate results

Files	Patch %	Lines
src/function/vector_hash_functions.cpp	87.75%	6 Missing ⚠️
src/common/sha256.cpp	77.27%	5 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #3212      +/-   ##
==========================================
- Coverage   92.28%   92.26%   -0.02%     
==========================================
  Files        1161     1163       +2     
  Lines       44150    44197      +47     
==========================================
+ Hits        40744    40780      +36     
- Misses       3406     3417      +11     

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[acquamarin]

I just want to double check how you are changing the mbedtls.

[acquamarin]

LGTM