Add link to infaction message in infraction log

[vivekashok1221]

A message link to where an infraction was issued could provide better context regarding an infraction. This feature has been suggested multiple times in #mod-meta and #mod-tools.
If the infraction was issued in a modmail category, the infraction log field for this feature will instead display "Infraction invoked in ModMail channel" or something similar. In future, the modmail log link for the thead can be displayed.

This feature will also require PR to the site repo since a new field for the jump url has to be added to the infraction model.

(Zig has approved this issue in a private channel).

[vivekashok1221]

Just to be clear, this is how the "infraction log" of a user currently look like: