Add generator weights for MC samples in 2022 #42
Description
For most of the samples, generator weights have been added to the MC samples of the 2022postEE era in #41 and of the 2022preEE era in #44. For some samples, too many files are unavailable, therefore we currently cannot calculate reliable generator weights.
The generator weights for these samples should be calculated at a later point.
To remind us that no valid generator weights exist for these samples, the values have been set to null/None.