[IMP] microsoft_outlook, fetchmail_outlook *: improve usability

* fetchmail, google_gmail, fetchmail_gmail

Purpose
=======
Improve the usability of the outlook modules.

Specifications
==============
Remove the checkbox "Use Outlook" and instead use the
smtp_authentication and the server_type, to be consistent with Gmail.

Hide the password field for Outlook / Gmail mail servers.

Add constraints on the outgoing mail server to force the user to use
the right configuration (e.g. the from_filter, so the sending does not
fail).

Add an option in the mail module to install Outlook.

Show a message for the outgoing mail servers to explain each
authentication methods.

Task-2811567

Part-of: odoo/odoo#88215

addons/google_account/models/google_service.py

@@ -131,7 +131,7 @@ class GoogleService(models.AbstractModel):
             raise UserError(_('Google %s is not yet configured.', service.title()))
 
         if not refresh_token:
-            raise UserError(_('The refresh token for authentication is not set.'))
+            raise UserError(_('Your Google account is not connected.'))
 
         try:
             result = requests.post(