Draft: Neutral pid calib v1

Modifications to the previous merge request: !2644 (merged) Need to tune Dsst->DsG line. The rate is too high.

Lines	Name	Rates (kHz)	BW(GB/s)
B^0\to K^+\pi^-\gamma	Hlt2PID_BdToKstG	0.02	0.009
B^0_s \to \phi(1020) \gamma	Hlt2PID_BdToKstG	0.04	0.011
D^{*+}_s \to D^{+}_s \gamma	Hlt2PID_Dsst2DsG	0.26	0.058
\eta \to \rho(770)^0 \gamma	Hlt2PID_EtaMuMuG	0.24	0.074
D^{+}_{s} \to \eta^{\prime} \pi^+	Hlt2PID_D2EtapPi	?	?
D^{*+} \to D^{0} \pi^{+}	Hlt2PID_DstToD0Pi_D0ToKPiPi0Resolved	?	?
D^{*+} \to D^{0} \pi^{+}	Hlt2PID_DstToD0Pi_D0ToKPiPi0Merged	?	?