LDAP do-not-store-internal-password still writes the hash

## What

LDAP “do not store internal password”: password is still written on change, and it is unclear whether disabling storage removes already-saved hashes.

## Want

- LDAP “do not store internal password”: password is still written on change,
- It is unclear whether disabling storage removes already-saved hashes

## Ideas this came from

- [#9518 LDAP source: internal password is written after password change (without "update internal password on login")](https://github.com/goauthentik/authentik/issues/9518) — With the new option "update internal password on login" (passwordloginupdateinternalpassword) disabled, I expected, that passwords are not written to the databa
- [#9748 Does disabling LDAP password storage remove already saved passwords ?](https://github.com/goauthentik/authentik/issues/9748) — In 2024.4 a feature was introduced to disable password hashing in authentik. I wonder if this will "clear" already hashed passwords and really force users to be