Add ΔS=2 hyperons lines

This MR adds the forbidden (or very rare) decays which change strangeness by 2 units (ΔS=2) or more: Omega->LambdaPi and Xi->PPi, etc.

The stream is set to Charm (which probably gives the best overlap in kinematics) but can be changed to anything else. The WG is set to RD because these are rare/forbidden decays but can be changed to whatever else...

StrippingReport                                                INFO Event 100000, Good event 100000
 |                                              *Decision name*|*Rate,%*|*Accepted*| *Mult*|*ms/evt*|
 |_StrippingGlobal_                                            |  0.5810|       581|       |   3.209|
 |_StrippingSequenceStreamCharm_                               |  0.5810|       581|       |   3.199|
 |!StrippingS2HyperonsXi02PPi                                  |  0.4120|       412|  1.012|   1.145|
 |!StrippingS2HyperonsXim2PPiPi                                |  0.0380|        38|  1.105|   0.182|
 |!StrippingS2HyperonsOmegaminus2LambdaPi                      |  0.0870|        87|  1.011|   0.479|
 |!StrippingS2HyperonsXi02PK                                   |  0.0000|         0|  0.000|   0.488|
 |!StrippingS2HyperonsOm2PPiPi                                 |  0.0620|        62|  1.194|   0.188|
 |!Stripping2HyperonsXi02PP_TIMING                             |  0.4120|       412|  1.012|   0.023|
 |!Stripping2HyperonsXim2PPiP_TIMING                           |  0.0380|        38|  1.105|   0.019|
 |!Stripping2HyperonsOmegaminus2LambdaP_TIMING                 |  0.0870|        87|  1.011|   0.018|
 |!Stripping2HyperonsXi02PK_TIMING                             |  0.0000|         0|  0.000|   0.020|
 |!Stripping2HyperonsOm2PPiP_TIMING                            |  0.0620|        62|  1.194|   0.018|

one of them gives 0 events but I found nothing wrong with it.

@iwilliam @sferrere