use the NSWCalib tool in the sTGCToPrepData converter and changing sTGC TDO folder tag

This MR introduces several fixes in the calibration of the time (and charge) of the sTGC detectors:

• The use of the calibrations is added to the sTGCRDOToPrepDataTool. This changes the content of the ESD variables strips times and strip charges and also introduces a shift of the cluster position since the pedestal of the charge calibration was not taken into account properly. The change of sTGC cluster position will introduce changes in all the muon reconstruction variables, leading to frozen-tier0-violating. But since this is a bugfix the changes are expected.
• The sTGC TDO conditions tag was updated since a bug in tdo calibration constants was found. The tag is still hardcoded but should eventually end up in conditions tag.

Tagging @pscholer @chchau @jojungge @rosati