Make sure that files with the complete datamodel can be read (#361)

* Move coll creation into type specific functions

- Easier for testing if the counter is reset for every type
- Easier to read / maintain

* Make creation functions importable

* Capitalize global variables

* Fix missing arguments and returns

* Import argparse and sys only when necessary

* Make sure to write all vector members of tracks

* Add check for complete EDM4hep file

* Run tests also for RNTuple files

* Also check Link collections

* Workaround pythonizations changing mutability of objects

* Rename tests to make it easier to define dependencies

* Move tests to more appropriate place

* Make sure to only run pytest on things it can run on

* Move imports to the top

* Check Link collections in the same order as in yaml file

* Don't start the counter at 0 to avoid hitting empty defaults

* Apply suggestions from code review

Co-authored-by: Mateusz Jakub Fila <[email protected]>

* Ignore regex matches from Dart printouts

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Co-authored-by: Mateusz Jakub Fila <[email protected]>