Deleted users can reset their password

[jdavcs]

Describe the bug
A deleted or deleted+purged user can reset their password. The last_password_change update triggers a new update_time value in the database.

Galaxy Version and/or server at which you observed the bug
Galaxy Version: 24.0

To Reproduce
Steps to reproduce the behavior:

1. Create a user
2. Log in, log out as user
3. Log in as admin, delete or delete+purge user
4. Reset password as user

Expected behavior
A deleted user should have their username/email recognized; password reset feature should give appropriate message.

[jdavcs]

Fixed in #18459