Launch log in process of Azure Cloud Shell when expiring the access token.

# Description of the new feature/enhancement
When the access token for Azure Cloud Shell expires, showing log-in prompt is wanted.

Currently, only an error message which means the token is already expired is shown as the following screenshot if the token is expired.
So the user needs to remove the connection setting once.

# Proposed technical implementation details (optional)

If the token is expired, it's better that the login process restarts again instead of showing the current error message.
Or it's more appropriate that the messages indicate that the connection settings have to be deleted once.

Could you please consider that?

Thanks.

Start by tracing how Azure Cloud Shell handles an expired access token and where the current error message is produced. Compare the available login-restart and connection-setting-removal behaviors, then verify that expiration leads to a clear login prompt or actionable guidance.

Written by the indexing model from the issue text.