* allows portal users to update their password
* and manage their API keys
* any anything technical / security related we may need to add in the
  future

Also bridge module for the password meter (auth password policy).

* auth_password_policy_signup, auth_signup, website, portal, survey,
  web_unsplash, website

Following the new editor's merge at https://github.com/odoo/odoo/pull/29775
web_editor.base has been moved to website while it was still used by
frontend pages which do not depend on website (especially portal).

This commit moves web_editor.base to portal while waiting for
https://github.com/odoo/odoo/pull/29442. It also removes the unnecessary
dependencies to it in non-portal pages (in survey for example).

* generic strenght meter widget which can be included in various
  places
* password field, taking over the isPassword special cases strewn
  throughout the codebase, this should probably become an actual thing
  in core /cc @ged-odoo, the meter is opt-in as most uses of
  `field[@password=True]` are passwords & secrets for third-party
  services or external servers for which a meter would not make sense
* separate override of the ChangePassword wizard which isn't a regular
  view for some reason
* direct implementation for signup pages (create user & reset password)

Skip/comment/remove existing testing of @password fields: the policy
replacement/augmentation needs to make an RPC call and does not
support readonly use (because it doesn't seem to be used anywhere so
that made sense?); and there currently is no way to augment or
override/replace existing tests, so the tests will either fail when
auth_password_policy is installed (current situation) or fail when
auth_password_policy is not installed (if updated to be compatible
with APP).