password change for former SAML user not working

### problem

As an admin I'm able to reset password for a regular user without problems.
If SAML has been enabled for that user this is no longer possible within CloudStack. Expected behavior.
Once I disable SAML for that user I would expect that I'm able to change the password again. That is not the case and the error below will appear.

### versions

ACS 4.20.1

### The steps to reproduce the bug

1. run all steps as admin
2. create a user
3. reset the password for that user
4. enable SAML (needs to be configured before) for this user
5. try to reset the password (will fail)
6. disable SAML for this user
7. try to reset the password (should work?) will fail
...

### What to do about it?

Enable the possibility to change the password for a former SAML user.

Reproduce el flujo de restablecimiento de contraseña del administrador en CloudStack 4.20.1: crea un usuario, habilita SAML, deshabilítalo y vuelve a intentar el restablecimiento. Rastrea el punto de entrada del cambio de contraseña y el estado de SAML del usuario; se considera completado cuando un administrador puede restablecer la contraseña después de deshabilitar SAML sin el error indicado.

Escrito por el modelo de indexación a partir del texto del issue.