directory.Group entry for groups

[calebdoxsey]

Summary

This PR changes how we store groups. We will now store a separate directory.Group entry in the databroker and the directory.User groups field has been renamed to group_ids. On evaluation we then look up the corresponding directory.Group based on that ID.

I updated all the directory providers to return this information and updated the manager to sync it accordingly. Other changes:

1. The Azure group name was displayName not name.
2. Using field selection with Google resulted in a 400 error when I tested it locally, so I removed it and returned everything.

Related

(bdd edit)

• discuss: change policy to support unique entity id's only #573

Checklist:

• add related issues
• updated docs
• updated unit tests
• updated UPGRADING.md
• ready for review

[codeclimate]

Code Climate has analyzed commit f99de4f and detected 2 issues on this pull request.

Here's the issue category breakdown:

Category	Count
Complexity	2

View more on Code Climate.

[codecov]

Codecov Report

Merging #1118 into master will decrease coverage by 0.7%.
The diff coverage is 35.9%.

@@           Coverage Diff            @@
##           master   #1118     +/-   ##
========================================
- Coverage    55.4%   54.6%   -0.8%     
========================================
  Files         100     100             
  Lines        7121    7251    +130     
========================================
+ Hits         3951    3966     +15     
- Misses       2865    2980    +115     
  Partials      305     305             

Impacted Files	Coverage Δ
authorize/evaluator/evaluator.go	25.3% <0.0%> (-2.2%)	⬇️
internal/identity/manager/manager.go	0.0% <0.0%> (ø)
authenticate/handlers.go	68.9% <27.2%> (-1.5%)	⬇️
internal/directory/okta/okta.go	74.3% <77.7%> (+0.6%)	⬆️
internal/directory/onelogin/onelogin.go	71.1% <80.9%> (+0.5%)	⬆️
internal/directory/github/github.go	68.6% <81.8%> (+1.1%)	⬆️
internal/directory/gitlab/gitlab.go	71.1% <83.3%> (+0.8%)	⬆️
internal/directory/azure/azure.go	71.8% <84.2%> (+0.5%)	⬆️
internal/controlplane/xds_listeners.go	46.2% <0.0%> (+0.1%)	⬆️