Features/#1048 desagg dsm time series

[khelfen]

Fixes #1048 .

Before merging into dev-branch, please make sure that

• [x] the CHANGELOG.rst was updated.
• [x] new and adjusted code is formated using black and isort.
• [x] the Dataset-version is updated when existing datasets are adjusted.
• [x] the branch was merged into the continuous-integration/run-everything-over-the-weekend-branch.
• [x] the workflow is running successful in test mode.
• [x] the workflow is running successful in Everything mode.

[khelfen]

@IlkaCu I create a revert of the revert to repeat my PR #1052 . Anyone got time reviewing these changes?