Unsupported command prompts for plugin to execute

### How did you install the Amplify CLI?

npm

### If applicable, what version of Node.js are you using?

_No response_

### Amplify CLI Version

11.0.0-beta.6

### What operating system are you using?

Mac

### Did you make any manual changes to the cloud resources managed by Amplify? Please describe the changes made.

no

### Describe the bug

running an supported command on hosting shows the following prompt

```
amplify override hosting
```

selecting a different prompt shows the full help list


### Expected behavior

exit with just a warning

### Reproduction steps

1. amplify override hosting
2. see prompt and select one

### Project Identifier

_No response_

### Log output

```
# Put your logs below this line

```

### Additional information

_No response_

### Before submitting, please confirm:

- [X] I have done my best to include a minimal, self-contained set of instructions for consistently reproducing the issue.
- [X] I have removed any sensitive information from my code snippets and submission.

Reproduce the behavior with `amplify override hosting` on the Amplify CLI version and operating system described, then trace the hosting override command's prompt handling. Done means unsupported commands exit with only a warning instead of showing a prompt or the full help list.

Written by the indexing model from the issue text.