SymfonyMailer::mail should handle other exception types

Initial patch

Just by reading the issue summary, I am unsure if this change is needed

DSN which fails in \Symfony\Component\Mailer\Transport\Dsn::fromString with InvalidArgumentException.

InvalidArgumentException is an unchecked exception, it is meant to stop execution to protect the system, IOW cause WSOD.

https://phpstan.org/blog/bring-your-exceptions-under-control

@Primsi, thanks for the patch. Committed.

@mxr576, I take your point about the exception stopping execution, but I think in this case, that's already happening, since we're at the very end of the mailing process, and we're returning FALSE to tell the rest of Drupal that it failed. I don't see any harm in triggering Drupal to display a nicely-formatted error message rather than crashing with a WSOD.

Automatically closed - issue fixed for 2 weeks with no activity.