[Request] Allow oauth2_proxy configuration passthrough

[andrewazores]

Describe the feature

https://github.com/cryostatio/cryostat/issues/629

If the Operator allows full configuration of the oauth2_proxy, then not only can users create Basic auth configurations for user auth, but could also configure the proxy to delegate to a proper external OAuth provider. This would be more on par with the OpenShift OAuth Proxy.

Anything other information?

No response