Add benchmark notebooks for medium and late stages

[HealthyPear]

Requirement(s):

• merge PR Rollback for GRID support #52
• merge PR Update documentation for GRID support #54

Description:

This PR adds ,

• the notebooks which were missing (they needed large scale analyses to be used)
  • energy estimation,
  • particle classification,
  • angular distribution (in particular the PSF),
  • IRFs and sensitivity curve
• reference data for some plots
  • CTA requirements
  • ASWG data (old, to be updated and explicited)

Caveats:

Due to the fact that the GRID usage has been put on hold for so long,

• these notebooks are far from being complete products,
• it is possible that bugs are present
• they constitute somewhat a spin-off of ctaplot + cta-benchmarks (it is possible that some things could be recycled!)

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Codecov Report

Merging #55 into master will not change coverage.
The diff coverage is n/a.

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  Files          20      20           
  Lines        2268    2268           
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  Hits            9       9           
  Misses       2259    2259           

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[kosack]

Yeah, I think most of these will be merged with ctaplot/cta-benchmarks later (as already mentioned in the PR), but for now this is fine

[vuillaut]

All the reference datasets (and more) added in this PR are available in ctaplot:

• https://ctaplot.readthedocs.io/en/latest/notebooks/plot_cta_irf.html