Add template argument to Sampler friend
Add template argument to Sampler friend

(refs #14784)

lindsayad/moose,lindsayad/moose,laagesen/moose,andrsd/moose,harterj/moose,dschwen/moose,laagesen/moose,laagesen/moose,harterj/moose,dschwen/moose,lindsayad/moose,nuclear-wizard/moose,sapitts/moose,SudiptaBiswas/moose,jessecarterMOOSE/moose,milljm/moose,lindsayad/moose,SudiptaBiswas/moose,jessecarterMOOSE/moose,nuclear-wizard/moose,milljm/moose,bwspenc/moose,bwspenc/moose,idaholab/moose,milljm/moose,lindsayad/moose,milljm/moose,andrsd/moose,bwspenc/moose,jessecarterMOOSE/moose,laagesen/moose,bwspenc/moose,sapitts/moose,nuclear-wizard/moose,andrsd/moose,milljm/moose,andrsd/moose,harterj/moose,SudiptaBiswas/moose,sapitts/moose,SudiptaBiswas/moose,jessecarterMOOSE/moose,nuclear-wizard/moose,sapitts/moose,laagesen/moose,sapitts/moose,idaholab/moose,dschwen/moose,dschwen/moose,andrsd/moose,harterj/moose,idaholab/moose,jessecarterMOOSE/moose,bwspenc/moose,idaholab/moose,dschwen/moose,SudiptaBiswas/moose,idaholab/moose,harterj/moose