Add Password complexity settings

Upstream Issue: https://gitlab.com/gitlab-org/gitlab/-/issues/353874

Problem to solve

The current GitLab only supports modifying the length of the password，The customer suggested that many standards of the security audits in china need to check the complexity of passwords. They hope to add feature of password complexity settings in future version.

Proposal

Add some setting options, including character types, different types of character combination modes, etc.