Update scripts and tools to work with Rucio instead of PhEDEx

[amaltaro]

Impact of the new feature
WMAgent scripts in general

Is your feature request related to a problem? Please describe.
As we migrate to Rucio, we need to have the ability to quickly check on things in Rucio.

Describe the solution you'd like
Update scripts used for debugging/validation and eventual dev activities to talk to Rucio.
Example for the workflow validation script:
https://github.com/dmwm/WMCore/blob/master/test/data/ReqMgr/validate-test-wfs.py
and other scripts under /bin or here:
https://github.com/dmwm/WMCore/tree/master/bin/adhoc-scripts

Describe alternatives you've considered
none

Additional context
Some examples of the RESTful API usage can be found here: https://github.com/amaltaro/ProductionTools/blob/master/getRucioDID.py