add masked VELO modules to light ion HLT1 sequences
Adding masked module M21 to the default sequences for the light-ion collisions data taking (!2038 (merged))
In addition, adding backup sequences for excluding unstable VELO module M23
Adding masked module M21 to the default sequences for the light-ion collisions data taking (!2038 (merged))
In addition, adding backup sequences for excluding unstable VELO module M23