Add GitHubIdentityProvider

[joshuatcasey]

See #1859

[codecov]

Codecov Report

Attention: Patch coverage is 0% with 341 lines in your changes are missing coverage. Please review.

Project coverage is 37.96%. Comparing base (4465810) to head (8b8b1dd).

Files	Patch %	Lines
...s/supervisor/idp/v1alpha1/zz_generated.deepcopy.go	0.00%	111 Missing ⚠️
...ioned/typed/idp/v1alpha1/githubidentityprovider.go	0.00%	107 Missing ⚠️
...d/idp/v1alpha1/fake/fake_githubidentityprovider.go	0.00%	71 Missing ⚠️
...sor/listers/idp/v1alpha1/githubidentityprovider.go	0.00%	23 Missing ⚠️
...nalversions/idp/v1alpha1/githubidentityprovider.go	0.00%	21 Missing ⚠️
...rsioned/typed/idp/v1alpha1/fake/fake_idp_client.go	0.00%	2 Missing ⚠️
...ientset/versioned/typed/idp/v1alpha1/idp_client.go	0.00%	2 Missing ⚠️
...t/supervisor/informers/externalversions/generic.go	0.00%	2 Missing ⚠️
...formers/externalversions/idp/v1alpha1/interface.go	0.00%	2 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1898      +/-   ##
==========================================
- Coverage   38.25%   37.96%   -0.29%     
==========================================
  Files         347      351       +4     
  Lines       44207    44548     +341     
==========================================
+ Hits        16910    16912       +2     
- Misses      26785    27123     +338     
- Partials      512      513       +1     

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[benjaminapetersen]

Nice, first Github PR in flight!

[joshuatcasey]

closing... new PRs for GitHub IDP should go into a feature branch