Map thvCABundle to OIDCConfig.CACertPath

[jhrozek]

The WithOIDCConfig() function receives thvCABundle and jwksAuthTokenFile parameters but was not mapping them to OIDCConfig.CACertPath and OIDCConfig.AuthTokenFile. This meant custom CA certificates for OIDC validation were never used by the token validator.

Add the two missing field mappings so the proxyrunner can use custom CA certificates when validating OIDC tokens against issuers with non-public certificates (e.g., corporate Keycloak instances).

Related: #3141

Large PR Justification

There's a bunch of autogenerated changes. I don't know how to split the PR so that it would still cover the feature but be small. I could have added the types and then implementation but that seems suboptimal.

[github-actions]

Large PR Detected

This PR exceeds 1000 lines of changes and requires justification before it can be reviewed.

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## Large PR Justification

[Explain why this PR must be large, such as:]
- Generated code that cannot be split
- Large refactoring that must be atomic
- Multiple related changes that would break if separated
- Migration or data transformation

Alternative:

Consider splitting this PR into smaller, focused changes (< 1000 lines each) for easier review and reduced risk.

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[codecov]

Codecov Report

❌ Patch coverage is 57.02479% with 52 lines in your changes missing coverage. Please review.
✅ Project coverage is 64.82%. Comparing base (8571282) to head (520f799).
⚠️ Report is 10 commits behind head on main.

Files with missing lines	Patch %	Lines
...d/thv-operator/controllers/mcpserver_controller.go	13.79%	49 Missing and 1 partial ⚠️
cmd/thv-operator/pkg/oidc/resolver.go	88.88%	1 Missing and 1 partial ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #3391      +/-   ##
==========================================
- Coverage   64.85%   64.82%   -0.03%     
==========================================
  Files         375      377       +2     
  Lines       36626    36746     +120     
==========================================
+ Hits        23753    23821      +68     
- Misses      10999    11049      +50     
- Partials     1874     1876       +2     

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I provided the large PR justification in the opening comment.