NLB-6875: update R34 Directives

[Naveen-Gopu-F5]

Proposed changes

• Override the Directives under oidc_provider block to handle the number of arguments validation by adding the context block for oidc_provider
• Added unit test for argument validation.
• OIDC module: https://nginx.org/en/docs/http/ngx_http_oidc_module.html

Checklist

Before creating a PR, run through this checklist and mark each as complete.

• I have read the CONTRIBUTING document
• If applicable, I have added tests that prove my fix is effective or that my feature works
• If applicable, I have checked that any relevant tests pass after adding my changes
• I have updated any relevant documentation (README.md)

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 76.50%. Comparing base (eaaaa89) to head (b859d62).
⚠️ Report is 20 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #151      +/-   ##
==========================================
- Coverage   76.63%   76.50%   -0.13%     
==========================================
  Files          27       29       +2     
  Lines        1164     1460     +296     
==========================================
+ Hits          892     1117     +225     
- Misses        216      288      +72     
+ Partials       56       55       -1     

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.

🚀 New features to boost your workflow:

• ❄️ Test Analytics: Detect flaky tests, report on failures, and find test suite problems.