invites: Change resend invitation pathway to use existing code.

This code changes frequently enough that errors are bound to creep in.  The
main change is that this sends the original invitation email instead of the
reminder email, but I think that's fine.

zerver/lib/actions.py

@@ -4044,26 +4044,10 @@ def do_resend_user_invite_email(invite_id: int, realm_id: int) -> str:
     prereg_user.invited_at = timezone_now()
     prereg_user.save()
 
-    # sends a invitation reminder since 'custom_body' can not be resent
-    # imported here to avoid import cycle error
-    from zerver.context_processors import common_context
     clear_scheduled_invitation_emails(prereg_user.email)
-
-    link = create_confirmation_link(prereg_user,
-                                    prereg_user.referred_by.realm.host,
-                                    Confirmation.INVITATION)
-    context = common_context(prereg_user.referred_by)
-    context.update({
-        'activate_url': link,
-        'referrer_name': prereg_user.referred_by.full_name,
-        'referrer_email': prereg_user.referred_by.email,
-        'referrer_realm_name': prereg_user.referred_by.realm.name,
-    })
-    send_email(
-        "zerver/emails/invitation_reminder",
-        to_email=prereg_user.email,
-        from_address=FromAddress.NOREPLY,
-        context=context)
+    # We don't store the custom email body, so just set it to None
+    event = {"email": prereg_user.email, "referrer_id": prereg_user.referred_by.id, "email_body": None}
+    queue_json_publish("invites", event)
 
     return prereg_user.invited_at.strftime("%Y-%m-%d %H:%M:%S")