Add suggestion to use cross-device workflow to 'aws login' and 'aws sso login'

[ashovlin]

Issue #, if available: CLI-7846

Description of changes: This adds a suggestion to use the cross-device flag for aws login and aws sso login for users who initially don't include it, but are unable to open the redirect URL on the same device.

Before:

$ aws sso login --profile sso-admin
Attempting to open your default browser.
If the browser does not open, open the following URL:

<url>

After:

$ aws sso login --profile sso-admin
Attempting to open your default browser. If the browser does not open, open the following URL.
If you are unable to open the URL on this device, run this command again with the '--use-device-code' option.

<url>

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