don't verify users' bugzilla accounts
After Bugzilla auth changes [1] we can no longer test users' logins and passwords
for validity. Because we already have the user logged in through FAS, which
combats spam, the easiest solution is to simply drop the bugzilla login
verification process. The downside is that the user needs to manually CC himself
to that bug (if not CCed already).
This patch drops the verification process and adjusts the form templates so that
the user is advised to CC himself to the bug.
[1] https://listman.redhat.com/archives/bugzilla-announce-list/2022-February/msg00000.html
Related: https://pagure.io/fedora-qa/blockerbugs/issue/230