Obscore rucio ingestion

[Lukas113]

Adds to SRCNet efforts:

• Added get_ivoid to ObsCoreMeta to create obs_creator_did mandatory field
• Introduced karabo.data.src module and RucioMeta class to add utility functionality for ObsCore metadata ingestion.
• Added examples.SRCNet_rucio_meta example script for metadata creation.
• Added some tests for new features.
• Minor improvements like making some args kw-only to avoid anti-patterns like boolean trap.

[Lukas113]

[codecov[bot]]

Codecov Report

Attention: Patch coverage is 90.72165% with 9 lines in your changes missing coverage. Please review.

Project coverage is 68.52%. Comparing base (f3fcee6) to head (8696b59).

Files	Patch %	Lines
karabo/data/src.py	87.80%	5 Missing :warning:
karabo/data/obscore.py	90.69%	4 Missing :warning:

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #597 +/- ## ========================================== + Coverage 68.21% 68.52% +0.30% ========================================== Files 52 54 +2 Lines 5562 5645 +83 ========================================== + Hits 3794 3868 +74 - Misses 1768 1777 +9 ```

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