[Task]: create a new mail server metadata type to allow all mail actions and transforms to reuse the same server configuration

[bamaer]

What needs to happen?

All mail actions and transforms currently require repeating the mail server configuration for each action or transform instance.

A mail server (pop/imap/smtp) metadata type will allow all mail actions and transforms in a project to reuse the existing configuration.

Issue Priority

Priority: 2

Issue Component

Component: Actions, Component: Transforms

[bamaer]

.take-issue

[bamaer]

duplicated and replaced by #4791