feat: support direct querying of AD group membership via LDAP

[kriswest]

resolves #909

Adds support for using LDAP directly to confirm AD group membership, which is enabled when the apis.ls config is not set. Also adds documentations for the AD related parts of the config.

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[codecov]

Codecov Report

Attention: Patch coverage is 0% with 15 lines in your changes missing coverage. Please review.

Project coverage is 49.42%. Comparing base (3718943) to head (189ec0c).

Files with missing lines	Patch %	Lines
src/service/passport/activeDirectory.js	0.00%	12 Missing ⚠️
src/config/index.ts	0.00%	2 Missing ⚠️
src/service/passport/index.js	0.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #972      +/-   ##
==========================================
- Coverage   49.65%   49.42%   -0.24%     
==========================================
  Files          48       48              
  Lines        1718     1726       +8     
  Branches      175      175              
==========================================
  Hits          853      853              
- Misses        841      849       +8     
  Partials       24       24              

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[kriswest]

Fixed teh cypress test but am waiting on a review (in git proxy), will update monday with working cypress tests

[kriswest]

I'm not sure I can improve the test coverage on this - unless someone has a suggestion on mocking passport. We are however using it successfully this end. Configs were documented.

Otherwise ready for review @JamieSlome

[kriswest]

@JamieSlome @grovesy @coopernetes Keen to get a review on this - also it should be tested by someone using a REST API to check group meembership.