Enable TLSRoutes to route to another namespace

[mpstefan]

trafficstars

As a user of NGF utilizing TLS passthrough I want to enable my TLSRoute to route to a service in another namespace So that my single Gateway object can route my TLS traffic to my applications in other namespaces.

Acceptance

Given that NGF is installed in namespace A And given a TLSRoute is created referencing a service in namespace B When a referenceGrant is created allowing the TLSRoute to access namespace B Then incoming traffic to the Gateway in namespace A that matches the TLSRoute criteria will be forwarded to the service in namespace B