Apply auto email censor rule to outgoing messages

[schlos]

Actual behavior

When user adds personal email address to request, it is sent to authority. This results in answers being received on personal email address while public request on IPZ stays hanging without updates.

Steps to reproduce

Expected behavior

Automatically censorsed email addresses should stay censorsed in Outgoing Messages to protect IPZ user privacy.

Related:

• Don't apply censor rules to OutgoingMessage#body in AdminOutgoingMessagesController#edit https://github.com/mysociety/alaveteli/issues/4760
• Censor rule is applied in outgoing email https://github.com/mysociety/alaveteli/issues/2341

[schlos]

Censor rule that I manually set on user level is automatically applies on outgoing messages -> as expected, PASS.

Closed with 0.39.x.x.