Add event type filter to ctapipe-process

[maxnoe]

Allows filtering out un-wanted event types form the output.

[codecov]

Codecov Report

Merging #1841 (e660fac) into master (9ee0635) will increase coverage by 0.00%.
The diff coverage is 97.56%.

❗ Current head e660fac differs from pull request most recent head ec6092a. Consider uploading reports for the commit ec6092a to get more accurate results

@@           Coverage Diff           @@
##           master    #1841   +/-   ##
=======================================
  Coverage   92.18%   92.18%           
=======================================
  Files         188      189    +1     
  Lines       15156    15101   -55     
=======================================
- Hits        13971    13921   -50     
+ Misses       1185     1180    -5     

Impacted Files	Coverage Δ
ctapipe/tools/process.py	93.10% <80.00%> (-0.80%)	⬇️
ctapipe/utils/__init__.py	100.00% <100.00%> (ø)
ctapipe/utils/event_type_filter.py	100.00% <100.00%> (ø)
ctapipe/utils/tests/test_event_filter.py	100.00% <100.00%> (ø)
ctapipe/io/tableio.py	91.39% <0.00%> (-1.25%)	⬇️
ctapipe/io/datawriter.py	88.81% <0.00%> (-0.08%)	⬇️
ctapipe/io/tests/test_hdf5.py	99.57% <0.00%> (-0.02%)	⬇️
ctapipe/io/tests/test_column_transforms.py
ctapipe/io/hdf5tableio.py	97.03% <0.00%> (+0.06%)	⬆️
ctapipe/io/hdf5eventsource.py	91.57% <0.00%> (+0.08%)	⬆️
... and 1 more

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