feat: Add keycloak flags to client registration container

[d0w]

Description

Adds two new environment variables to the client registration container in the container_builder component of the webhook. The changes mimic changes made to the old platform-operator (kagenti/kagenti-operator#136)

Fixes # (issue)
Related to

• ✨ Keycloak feature flags for installation and configuration kagenti#399
• ✨ Add env variables to client registration container kagenti-operator#136

Type of Change

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• Documentation update
• Refactoring (no functional changes)
• Performance improvement
• Test addition or update
• CI/CD update

How Has This Been Tested?

• Test A
• Test B

Test Configuration:

• Kubernetes version:
• Toolhive webhook version:
• OS:

Checklist

• My code follows the style guidelines of this project
• I have performed a self-review of my code
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• My changes generate no new warnings
• I have added tests that prove my fix is effective or that my feature works
• New and existing unit tests pass locally with my changes
• Any dependent changes have been merged and published in downstream modules

Screenshots (if appropriate)

Additional Notes

[github-actions]

This pull request has been automatically marked as stale because it has not had recent activity. It will be closed in 14 days if no further activity occurs. If this PR is still relevant, please comment or remove the stale label.