Prompt new version when there is a new version of the running extension

- If the issue is to do with Azure CLI 2.0 in-particular, create an issue here at [Azure/azure-cli](https://github.com/Azure/azure-cli/issues)

### Extension name (the extension in question)

### Description of issue (in as much detail as possible)
The author of quantum extension @ricardo-espinoza asked is there a way to prompt users to update extension version.

This issue is a feature request.

My preliminary thought is prompt new version when there is a new version of the running extension in frequency of once a week.
When users run
```
az quantum ...
```
If there is a new version, give a warning like
```
A new version *** of quantum extension is available. Current version is ***. Run *** to install latest version.
```

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