fix: add coords and dims to as_dataarray

[FabianHofmann]

Follow up to #580

Harmonize coords and dims for non-xarray mask objects.

Checklist

• Code changes are sufficiently documented; i.e. new functions contain docstrings and further explanations may be given in doc.
• Unit tests for new features were added (if applicable).
• A note for the release notes doc/release_notes.rst of the upcoming release is included.
• I consent to the release of this PR's code under the MIT license.