support more generic oidc

[Buzz1167]

Description

Scaler uses PyHPS and pyHPS didn't support OIDC discovery, only hardcoded things for keycloak, add those new features and a new one to allow grabbing the auth_url from JMS instead of the client needing to know it.

Checklist

• [ ] I have tested these changes locally.
• [ ] I have added unit tests (if appropriate).
• [ ] I have added necessary documentation or updated existing documentation.
• [ ] I have linked the issue(s) addressed by this PR if any.

[codecov[bot]]

Codecov Report

Attention: Patch coverage is 73.97260% with 19 lines in your changes missing coverage. Please review.

Project coverage is 93.25%. Comparing base (f9cad07) to head (228a764). Report is 1 commits behind head on main.

Files	Patch %	Lines
src/ansys/hps/client/client.py	66.66%	15 Missing :warning:
src/ansys/hps/client/authenticate.py	85.71%	4 Missing :warning:

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #431 +/- ## ========================================== - Coverage 93.75% 93.25% -0.51% ========================================== Files 64 64 Lines 2435 2489 +54 ========================================== + Hits 2283 2321 +38 - Misses 152 168 +16 ```

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