Ability to send test email from Utilities as well as in Settings > Email

[paulgoodfield]

Currently, the only way to send a test email is from Settings > Email. Since most sites using project config have Settings disabled on non-dev environments there is no way to send a test email from these, even though they'll likely have different SMTP settings than the dev environment.

If there was also an option in Utilities to send a test email then you'd be able to check the mail settings are still working on these non-dev environments.