feat(acm-pca): implement RevokeCertificate API

[HarshCasper]

See localstack/localstack#10299

[bblommers]

This check fails in ServerMode unfortunately, because we can't reach the backend when Moto is running in a separate process.

The next check (that get_certificate fails) should work, so ideally we only guard this section (if TEST_SERVER_MODE: ...)

[HarshCasper]

Seems like that isn't working out on the proxy mode. I have added a skip for this whole test in proxy mode. Let me know if that's not ideal!

[bblommers]

Makes sense @HarshCasper! Looks like there are just some merge conflicts, once that's fixed I'd be happy to merge

[codecov]

Codecov Report

Attention: Patch coverage is 92.30769% with 1 line in your changes missing coverage. Please review.

Project coverage is 92.85%. Comparing base (fcb513c) to head (35b41c0).
Report is 19 commits behind head on master.

Files with missing lines	Patch %	Lines
moto/acmpca/models.py	90.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #8838      +/-   ##
==========================================
+ Coverage   92.82%   92.85%   +0.03%     
==========================================
  Files        1266     1281      +15     
  Lines      110646   111653    +1007     
==========================================
+ Hits       102704   103676     +972     
- Misses       7942     7977      +35     

Flag	Coverage Δ
servertests	27.98% <15.38%> (-0.10%)	⬇️
unittests	92.83% <92.30%> (+0.03%)	⬆️

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