Opa Auth: Skip Polaris native principal and RBAC resolution in `OpaPolarisAuthorizer`

### Is your feature request related to a problem? Please describe.

As a result of https://github.com/apache/polaris/issues/3779 system administrators can now deploy Polaris with custom `PolarisAuthorizer` implementations that skip RBAC and principal resolution in the request flow.

This issue tracks the work in making breaking changes to skip principal and RBAC resolution in `OpaPolarisAuthorizer` in auth/opa extension.

### Describe the solution you'd like

Using `OpaPolarisAuthorizer` no longer requires Polaris native principal and RBAC, and instead passes the principal attributes to OPA as the policy authority.

### Describe alternatives you've considered

_No response_

### Additional context

_No response_