Merge pull request #54245 from deads2k/cli-03-postraw

Automatic merge from submit-queue. If you want to cherry-pick this change to another branch, please follow the instructions <a href="https://github.com/kubernetes/community/blob/master/contributors/devel/cherry-picks.md">here</a>.

add kubectl create --raw -f

Adds `--raw` to `kubectl create` to match `kubectl get --raw`.  It re-uses the transport, reads the input stream (stdin or a single file for now) and posts directly to the endpoint specified.  This let's you direct data directly at a subresource (as a for instance).  I'd like to see this extended to `kubectl replace` too, so that we have full access to subresources via scripting without having to reproduce the transports.

@kubernetes/sig-cli-pr-reviews 

```release-note
add `--raw` to `kubectl create` to POST using the normal transport
```

hack/make-rules/test-cmd-util.sh

@@ -936,6 +936,9 @@ run_create_tests() {
     # Post-condition: jsonpath for .metadata.namespace should be empty for object since --namespace was not explicitly specified
     kube::test::if_empty_string "${output_message}"
 
+    kubectl create configmap tester-create-cm -o json --dry-run | kubectl create "${kube_flags[@]}" --raw /api/v1/namespaces/default/configmaps -f -
+    kubectl delete -ndefault "${kube_flags[@]}" configmap tester-create-cm
+
     set +o nounset
     set +o errexit
 }
@@ -3674,6 +3677,11 @@ run_kubectl_create_error_tests() {
   fi
   rm "${ERROR_FILE}"
 
+  # Posting a pod to namespaces should fail.  Also tests --raw forcing the post location
+  [ "$( kubectl convert -f test/fixtures/doc-yaml/admin/limitrange/valid-pod.yaml -o json | kubectl create "${kube_flags[@]}" --raw /api/v1/namespaces -f - --v=8 2>&1 | grep 'cannot be handled as a Namespace: converting (v1.Pod)')" ]
+
+  [ "$( kubectl create "${kube_flags[@]}" --raw /api/v1/namespaces -f test/fixtures/doc-yaml/admin/limitrange/valid-pod.yaml --edit 2>&1 | grep 'raw and --edit are mutually exclusive')" ]
+
   set +o nounset
   set +o errexit
 }