[bugfix] correct error message when app version is not found

[ayys]

This PR corrects the error message reported when the app version is not found on registry.

[theduke]

This fixes the bad error message, but does not close #4647 .

Getting logs with an app id should still work.

The issue is that the command uses Identifier, while most of the other commands use AppIdentOpts, which supports finding the app from an app.yaml in the local directory, ns/name, and app id.
Problem is that it doesn't support a specific app version, which Identifier supports.

But all of these variations should work.

[theduke]

Since the query takes an owner + namespace, the CLI can detect that it's an app id, and do a query to resolve the owner/name itself.