Feat: add topic resource missing methods (#22)

* [feat] Add version, prod endpoint and override

Now we default to prod environment
and created an env variable for dev
overrides

* [chore] update proto files

This includes the changes to support
Topic endpoints.

* [bug] return error on token authentication failure

We were not failing even if the request returned
a non-200 error code.

* [bug] Do not remove resource from state in datasources

Does not make sense here, if the cluster is
not there, that means that the user used a
cluster ID that does not exist.

* [chore] remove warning on empty provider data.

In the early configuration of the terraform lifecycle,
the provider data is not set and is valid.

* [bug] Fix wrong error message in user import

* [chore] implement missing topic resource methods

This includes:

- Update
- Import
- Read

There are a few workarounds commented in the code.

main.go

@@ -10,7 +10,9 @@ import (
 )
 
 // TODO: We should update this on build. Part of the release process
-var version = "ign"
+var version = "0.0.0-alpha"
+
+const defaultCloudEnv = "prod"
 
 func main() {
 	var debug bool
@@ -20,7 +22,7 @@ func main() {
 
 	err := providerserver.Serve(
 		context.Background(),
-		redpanda.New(context.Background(), version),
+		redpanda.New(context.Background(), defaultCloudEnv, version),
 		providerserver.ServeOpts{
 			Address: "registry.terraform.io/redpanda-data/redpanda",
 			Debug:   debug,