Update yll binning

[davidwalter2]

Harmonizing the dataset resources

• Dataset names are given by "dataset_era" for example "Zmumu_2016postVFP", "Zmumu_2017" etc.
• The dataset names for data are changed to "primaryDataset_era" e.g. "SingleMuon_2018A" instead of just "Data" for similar reasons.
• This allows to process datasets from different eras in one histmaker e.g. in the gen histmaker
• The cross sections are now defined in common to have them at a single place

Update on binning

• Switching to use 20 quantiles in yll for Z reco level fit, updating the quantile file correspondingly
• Updating the angular coefficients file to the updated binning with different binning between W and Z. But using the same file now for all analyses (except theory agnostic).
  • Verified to get the same results for the W (when using 2016postVFP samples only)
  • The new file include the 2017 and 2018 samples, leading to small differences also for the W
• Removed duplicated binning definition and tried to harmonize small differences
• Update theory corrections with fine binning for the Z