Add methods to read run config and shower distribution to TableLoader

[maxnoe]

No description provided.

[codecov]

Codecov Report

Merging #2010 (2e60e91) into master (ca25ce7) will increase coverage by 0.01%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##           master    #2010      +/-   ##
==========================================
+ Coverage   92.34%   92.35%   +0.01%     
==========================================
  Files         193      193              
  Lines       15658    15680      +22     
==========================================
+ Hits        14460    14482      +22     
  Misses       1198     1198              

Impacted Files	Coverage Δ
ctapipe/io/tableloader.py	96.55% <100.00%> (+0.08%)	⬆️
ctapipe/io/tests/test_table_loader.py	99.47% <100.00%> (+0.04%)	⬆️

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