Match group password policies to previous values

Temporarily set the password policies for privileged groups back to the
previous values (minimum password length of 1), until we have time to
communicate the change to all communities.

Should be deployed with Iad8e49ffcffed38df6293db0ef31a227d3962003

Bug: T94774
Change-Id: I137b4c5733d24f516c741c0f431677ce18145c48