tools: add mutex profile to heapWatch

[algorandskiy]

Summary

Add ability to capture mutex profile to heapWatch.py tool.
Usage example:

python3 ./test/heapwatch/heapWatch.py --period 10 --metrics \
 --mutex --blockinfo --runtime 3m -o ~/data/nodedata ~/networks/two-fut/Primary

Test Plan

Tested manually, example profile attached.

[codecov]

Codecov Report

Merging #5638 (6840c16) into master (72765c1) will decrease coverage by 0.03%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master    #5638      +/-   ##
==========================================
- Coverage   55.02%   55.00%   -0.03%     
==========================================
  Files         463      463              
  Lines       64494    64494              
==========================================
- Hits        35489    35473      -16     
- Misses      26635    26644       +9     
- Partials     2370     2377       +7     

see 8 files with indirect coverage changes

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[iansuvak]

LGTM

[AlgoAxel]

looks like everything was already ready for use, so just needed to wire it into the cli.