Release 3.3.2

Usually we follow semver and don't put features in releases. But current
master could use some more testing before tagging a new release, so it
was decided to backport the feature that adds support for setting FDE
passphrases via env var to the last stable version. This is required for
making the os-installer work with FDE (see pmaports MR 6320).

Features:
* pmb.install.format: add support for setting FDE passphrase via env var

Other:
* CI: ruff: use 0.11.0 (Cannot use star annotation)
* docs/env_variables: document PMB_FDE_PASSWORD