Since the API already disallows this, this pretty much just cleans up
the error reporting to the user.
Example of old error:
```
$ gh cs logs -c cwndrws-redacted
Starting codespace ⣽connecting to codespace: error starting codespace: HTTP 422: your codespace has an operation pending: updating to a sku with a different amount of storage; please wait until this operation is complete (https://api.github.com/user/codespaces/cwndrws-redacted/start)
exit status 1
```
Example of new error:
```
$ gh cs logs -c cwndrws-redacted
codespace is disabled while it has a pending operation: Changing machine types...
exit status 1
```
599c7c900f