Separate SMTP Connection Setup from Other Email Settings (#35177)

* separate SMTP connection settings from other email settings

* update tests based on now setup flow

- some tests were removed as the behaviors of the app have changed
- some tests were updated to validate the new SMTP connection card and setup process

* improve tests

* replace styled component with mantine flex

* fix type errors

* refactor breadcrumbs to use native solution in SettingsBatchForm

* only show breadcrumbs if email is already configured

* catch and handle error if form submission fails

* fix tests

* remove dead code

* fix test failure and consolidate similar E2E tests

* update unit tests to account for new behavior

* fix type error - remove unused dispatch prop

* update unit tests to account for redirect behavior

* move dispatch to useEffect and convert file to typescript

* fix button state on save error

* add unit tests for hiding SMTP configuration when cloud-hosted