Consider making GRPCRoute a required informer now that it is v1

[sunjayBhatia]

As of Gateway API v1.1.0, GRPCRoute is GA and has moved to the v1 API group version

When using Gateway API it is not currently required, i.e. it can be disabled via the --disable-feature flag

Should we make this a required resource to reconcile now that it is GA? Making it required will mean operators will need the CRD to be installed, RBAC to be set up, etc. It is potentially non-essential since there is a required Route type (HTTPRoute) when using Gateway API