Deprecated runtimes are displayed when creating an action in a non-existent runtime

When create an action in a non-existent runtime, deprecated runtimes are also printed in error messages.
```sh
$ wsk action create hello hello.js --kind foo
The specified runtime 'foo' is not supported by this platform. Valid values are: 'nodejs:10, java, sequence, ...'.
```
Can I create PR to display only not deprecated runtimes?
https://github.com/apache/openwhisk/blob/cf36299d5e/common/scala/src/main/scala/org/apache/openwhisk/core/entity/Exec.scala#L327