Fix error logging on domain and portfolios invitations

[abroddrick]

Issue description

When adding a domain manager, system attempts to send emails to all existing domain managers before updating registrar.
If any of the emails to existing domain managers fails, the entire action fails midstream blocking the domain invitation. This will be handled in another bug ticket however, when running into this scenario on getgov-development, we found out that the error handling had it's own bug:
the traceback was not logged at all and we couldn't trace the cause of why email sending worked for some managers and not this particular domain manager.

It appears the error handling added around invitations needs to be altered to insure tracebacks are logged and helpful information is provided to the person debugging.

Acceptance criteria

• all domain invitation and portfolio invitation error log the traceback successfully
• if easy to do: The current error message says "Could not send email invitation." is updated so that it indicates if a domain invitation or the portfolio invitation failed.

Additional context

No response

Links to other issues

No response