Add equality operators to AnyVector in Python

[JeanChristopheMorinPerso]

Add equality operators to AnyVector in Python. This is mostly useful for OTIO development, but it might also be useful to anyone using OTIO.

Extracted from #1490.

[codecov-commenter]

Codecov Report

Merging #1575 (7499c89) into main (6f4ed5e) will decrease coverage by 0.04%.
The diff coverage is 58.13%.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1575      +/-   ##
==========================================
- Coverage   80.04%   80.00%   -0.04%     
==========================================
  Files         197      197              
  Lines       21720    21755      +35     
  Branches     4309     4316       +7     
==========================================
+ Hits        17386    17406      +20     
- Misses       2182     2197      +15     
  Partials     2152     2152              

Flag	Coverage Δ
py-unittests	80.00% <58.13%> (-0.04%)	⬇️

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Impacted Files	Coverage Δ
...-opentimelineio/opentimelineio/core/_core_utils.py	79.69% <48.57%> (-4.82%)	⬇️
tests/test_core_utils.py	98.75% <100.00%> (ø)

... and 2 files with indirect coverage changes

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[JeanChristopheMorinPerso]

The implementation is working, but only for ==. I'll close and re-open when I have a better implementation.