Upgrade of DL2 production

[HealthyPear]

Summary description

• upgrades compatible with ctapipe 0.9.1
• upgrades compatible with the newer version of data training

Requirements

• [x] #58
• [x] #59

Caveats

• images still saved in a separate file (we should decide if the DL2 tool should let the user save images (I guess yes)
• model parameters are hardcoded in the script, but they should be read from the model configuration file
• I added telescope-wise estimated energy to the parameters for the gamma/hadron classifier which means that this information should be recorded soon

[codecov[bot]]

Codecov Report

Merging #77 (518642a) into master (e1239d0) will decrease coverage by 0.75%. The diff coverage is 0.81%.

@@            Coverage Diff             @@
##           master      #77      +/-   ##
==========================================
- Coverage   31.66%   30.91%   -0.76%     
==========================================
  Files          20       20              
  Lines        2201     2258      +57     
==========================================
+ Hits          697      698       +1     
- Misses       1504     1560      +56     

Impacted Files	Coverage Δ
protopipe/scripts/write_dl2.py	5.90% <0.81%> (-1.21%)	:arrow_down:

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