Add tight dimuon line and add change ProbNNmu to PIDmu for onia triggers

This MR is to add dimuon trigger lines for Jpsi, psi2S reconstruction with tight P,PT cuts and without flight-distance-related requirements. The proposal of this line has been presented in the A&S week (link).

The tight p, pT cuts are taken from the StrippingFullDSTDiMuonJpsi2MuMuTOSLine stripping line. For cutting the muon P, a new configuration minP_muon is added in the basic dimuon combiner in the onia directory.

Another modification is about the PID variable used for the trigger selections. I remember that we received the comments for several times, suggesting using the simpler DLL rather than ProbNN variables at least in the early data-taking stages, for a better control of the trigger performance. Maybe it's time to implement this change ? Here I take PIDmu larger than -5 to replace ProbNNmu larger than 0.1 .

Mark as WIP at this moment. Also FYI @lan @gcavalle , please let me know if you think the selection and configs looks OK, then I remove WIP label.

Efficiency compared to the existing prompt dimuon line (CanRecoChildren indicates the denominator of the efficiency requires decay products within LHCb geometry acceptance):

Hlt2 integrated efficiencies for the lines with denominator: CanRecoChildren
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Line:    Hlt2JpsiToMuMuLineDecision                              Efficiency:     0.743 +/- 0.018
Line:    Hlt2DiMuonJPsiTightLineDecision                         Efficiency:     0.332 +/- 0.019
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Finished printing Hlt2 integrated efficiencies for denominator: CanRecoChildren

Rate compared to the existing prompt and detached dimuon line (Estimated based on a hlt1 filtered sample and assuming 1MHz hlt1 output rate, which is the nominal setting in HltEfficiencyChecker. Exclusive rate defined based on all the triggers in onia directory.)

Hlt2 rates:
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Line:    Hlt2DiMuonJPsiTightLineDecision                         Incl:  0.8 +/- 0.28 kHz, Excl:  0.0 +/- 0.0  kHz
Line:    Hlt2JpsiToMuMuLineDecision                              Incl: 12.5 +/- 1.11 kHz, Excl:  6.6 +/- 0.80 kHz
Line:    Hlt2JpsiToMuMuDetachedLineDecision                      Incl:  1.8 +/- 0.42 kHz, Excl:  0.0 +/- 0.0  kHz
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