SUSYTools - Update PRW Handling
This MR updates the handling of PRW within SUSYTools:
- removes the support of mc16 r-tags
- adds support of m23a
- removes some outdated functionality to retrieve fixed PRW files for some HF-filtered V+jets samples
Fulfills a request in ATLSUSYBGF-670, tagging @mrimoldi & @martindl.