Fix input validation on cb create [--fork | --replica]

It was found that input validation was failing when creating a fork or
replica using the `--network` option. Specifically, the following error
was being returned:

``` error: Missing required arguments: platform, plan, region, storage
```

This is because when specifying a network none of these items are
required. Most importantly the platform and region are not allowed. This
was a minor oversight when allowing cross-region replicas was first
implemented.  Here we simply fix that issue and if `--network` is given
then we do not require the platform or region as well.

CHANGELOG.md

@@ -10,6 +10,8 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
   parameters. Supports `get`, `list-supported`, `reset` and `set`.
 
 ### Fixed
+- `cb create --fork` and `cb create --replica` input validation when using
+  `--network`.
 - `cb network` command completion suggestions.
 
 

src/cb/cluster_create.cr

@@ -58,7 +58,6 @@ class CB::ClusterCreate < CB::APIAction
                   target_time: @at,
                 ))
               elsif replica
-                puts params.inspect
                 @client.create_replica CB::Client::ReplicaCreateParams.new(**params.merge(
                   cluster_id: @replica.to_s,
                 ))