Config file is not included as input in activity provenance

[maxnoe]

Describe the bug

Starting the training tool, I noticed this logging warning (recently added in #2261):

2023-03-10 18:50:33,179 INFO [ctapipe.ctapipe-train-energy-regressor] (tool.initialize): Loading config from '[PosixPath('/home/mnoethe/Uni/CTA/2023-03-22-dpg-ctapipe/config/train_energy_regressor.yml')]'
2023-03-10 18:50:33,196 WARNING [ctapipe.core.provenance] (provenance._get_current_or_start_activity): No activity has been started yet. Provenance().start_activity(<name>) should be called explicitly.

Investigating, I saw that start_activity is called in Tool.run after the call to initialize, which loads the config. So the config was assigned to the wrong activity and thus not written to the right activity provenance in the provenance log.

[kosack]

I believe this can be closed as it was fixed in a previous PR. Running it now, I do not get this message and the config is in the provenance log as expected:

ctapipe-process.provenance.log

4806   │       "input": [
4807   │          {
4808   │             "url": "/Users/kkosack/Projects/CTA/PipeWork/ml_preprocessing_config.yaml",
4809   │             "role": "Tool Configuration"
4810   │          },
4811   │          {
4812   │             "url": "/Users/kkosack/Data/CTA/Prod6_preliminary/gamma_prod6_preliminary.simtel.zst",
4813   │             "role": "DL0/Event"
4814   │          }
4815   │       ],

[maxnoe]

Yes, sorry, I missed to make the correct connection, this was addressed in #2312