Add google_compute_target_tcp_proxy resource

[danisla]

Add support for TCP Proxies to create global TCP load balancers.

API Docs: https://cloud.google.com/compute/docs/reference/latest/targetTcpProxies#resource

The google_compute_global_forwarding_rule may also need to be updated to accept the TCP proxy in addition to the HTTP and HTTPS proxies.

[ghost]

I'm going to lock this issue because it has been closed for 30 days ⏳. This helps our maintainers find and focus on the active issues.

If you feel this issue should be reopened, we encourage creating a new issue linking back to this one for added context. If you feel I made an error 🤖 🙉 , please reach out to my human friends 👉 [email protected]. Thanks!