Draft: DerivationFrameworkPhys and DerivationFrameworkMCTruth: add back DFCommonTruthGenFilter and DFCommonTruthQGLabelTool

Hello,

This MR adds back two tools in the truth derivation framework that are scheduled in 21.2 but are currently not scheduled in master: DFCommonTruthGenFilter and DFCommonTruthQGLabelTool. Two EventInfo decorations coming from DFCommonTruthGenFilter are added to the PHYS and PHYSLITE output: GenFiltHT and GenFiltMET. These are needed in order to combine inclusive MC samples with HT- and MET-sliced extensions, for e.g. ttbar and single-top. I dropped hardScatterVertexLink from the SlimmingHelper.ExtraVariables because it is part of the EventInfo smart slimming list. TrueFlavor comes from DFCommonTruthQGLabelTool.

diff-root finds the following changes:

Py:diff-root         INFO comparing over [50] entries...
Py:diff-root      WARNING the following variables exist only in the new file !
Py:diff-root      WARNING  - [AntiKt4TruthDressedWZJetsAuxDyn.TrueFlavor]
Py:diff-root      WARNING  - [EventInfoAuxDyn.GenFiltHT]
Py:diff-root      WARNING  - [EventInfoAuxDyn.GenFiltMET]
Py:diff-root      WARNING  - [TruthTausAuxDyn.eta_vis_dressed]
Py:diff-root      WARNING  - [TruthTausAuxDyn.m_vis_dressed]
Py:diff-root      WARNING  - [TruthTausAuxDyn.nPhotons_dressed]
Py:diff-root      WARNING  - [TruthTausAuxDyn.phi_vis_dressed]
Py:diff-root      WARNING  - [TruthTausAuxDyn.pt_vis_dressed]
Py:diff-root         INFO comparing [1855] leaves over entries...
Py:diff-root         INFO Found [867229] identical leaves
Py:diff-root         INFO Found [0] different leaves
Py:diff-root         INFO all good.

Interestingly, the truth tau decorations that (re)appear were supposed to be present already, but with the else: augmentationToolsList = [] statement, DFCommonTruthTauDressingTool was purged from augmentationToolsList, it's now back.

I added the 'urgent' flag in case this MR can still make it for the upcoming DAOD_PHYS production expected imminently.

Cheers, Bertrand