[terraform] upgrade protoc-gen-terraform to v4

This issue will be used to track [protoc-gen-terraform](https://github.com/gravitational/protoc-gen-terraform) upgrade to `v4`. - [x] [RFD](https://github.com/gravitational/teleport.e/pull/8397) - [x] https://github.com/gravitational/teleport/pull/67080 - [x] https://github.com/gravitational/teleport/pull/67075 - [x] https://github.com/gravitational/teleport/pull/67084 - [x] https://github.com/gravitational/teleport/pull/67094 - [x] https://github.com/gravitational/teleport/pull/67139 - [x] https://github.com/gravitational/teleport/pull/67154 - [x] https://github.com/gravitational/teleport/pull/67216 - [x] https://github.com/gravitational/teleport/pull/67294 - [x] https://github.com/gravitational/teleport/pull/67345 - [x] https://github.com/gravitational/teleport/pull/67441 - [x] https://github.com/gravitational/teleport/pull/67478 - [x] https://github.com/gravitational/teleport/pull/67621 - [x] https://github.com/gravitational/teleport/pull/67894 - [x] https://github.com/gravitational/teleport/pull/68405