Batou-ext

- Nothing changed yet.

* Added component `batou_ext.http.HTTPServiceWatchdog` that adds a check to a systemd unit
whether a given URL is reachable (e.g. a `/health` endpoint). If the URL cannot be reached within
a certain interval, the service will be restarted. Further details are documented in the
docstring.

- Fix `SymlinkAndCleanup` async delete and allow custom extra arguments to `systemd run`.

- OCI: Support registries where the docker login is different than the registry used in referencing containers.

- OCI: Improve change detection of remote images (required for docker.io)

- OCI: The nix file does not contain sensitive data, so don’t mark it as such.

- OCI: add support for extraOptions

* Added a script `s3_bootstrap` that interactively creates an S3 bucket (including a radosgw account & keys if needed). Will be installed with `batou_ext` if the `s3-bootstrap` extra is requested.

- add an option to move mailhog log output (`stdout` + `stderr`) to a different namespace, e.g. "mailhog". see systemd.exec(5) for more information

- add an option to disable `stdout` logging for the mailhog service

- improve dectection of a versions file for versions updates

- fix the oci.Container verify method not throwing an updaterequired on changes to the docker container's environment file

- Add systemd-run async cleanup option for SymlinkAndCleanup removals

- Change the behaviour of the batou_ext.versions updater to allow environments to share a branch

* Added a component `batou_ext.git.Remote` which allows to manipulate remotes of a git repository.

- Improve output handling for the `PurgePackage` component. Will not appear like a fatal error in logs anymore when the package has been purged already or is not installed for another reason