erts: Simplify nif_SUITE:nif_whereis* tests
erts: Simplify nif_SUITE:nif_whereis* tests

and change some argc checks from badarg to assert.

getong/otp,vinoski/otp,bjorng/otp,lrascao/otp,mikpe/otp,legoscia/otp,emacsmirror/erlang,erlang/otp,ferd/otp,vladdu/otp,RoadRunnr/otp,vinoski/otp,emacsmirror/erlang,dumbbell/otp,dgud/otp,kvakvs/otp,g-andrade/otp,g-andrade/otp,vinoski/otp,bsmr-erlang/otp,erlang/otp,dgud/otp,bsmr-erlang/otp,g-andrade/otp,lrascao/otp,g-andrade/otp,g-andrade/otp,rlipscombe/otp,jj1bdx/otp,dgud/otp,dumbbell/otp,rlipscombe/otp,potatosalad/otp,emacsmirror/erlang,aboroska/otp,ferd/otp,uabboli/otp,bsmr-erlang/otp,rlipscombe/otp,mikpe/otp,vinoski/otp,dgud/otp,aboroska/otp,erlang/otp,erlang/otp,getong/otp,RoadRunnr/otp,getong/otp,kvakvs/otp,isvilen/otp,isvilen/otp,mikpe/otp,rlipscombe/otp,isvilen/otp,isvilen/otp,lrascao/otp,vinoski/otp,aboroska/otp,kvakvs/otp,rlipscombe/otp,jj1bdx/otp,electricimp/otp,bjorng/otp,uabboli/otp,mikpe/otp,legoscia/otp,jj1bdx/otp,electricimp/otp,dumbbell/otp,dumbbell/otp,RoadRunnr/otp,kvakvs/otp,erlang/otp,uabboli/otp,dgud/otp,uabboli/otp,uabboli/otp,emacsmirror/erlang,aboroska/otp,dumbbell/otp,g-andrade/otp,aboroska/otp,vladdu/otp,electricimp/otp,mikpe/otp,jj1bdx/otp,legoscia/otp,erlang/otp,legoscia/otp,isvilen/otp,kvakvs/otp,jj1bdx/otp,erlang/otp,RoadRunnr/otp,electricimp/otp,aboroska/otp,aboroska/otp,mikpe/otp,potatosalad/otp,legoscia/otp,rlipscombe/otp,bsmr-erlang/otp,bjorng/otp,bsmr-erlang/otp,dumbbell/otp,rlipscombe/otp,legoscia/otp,ferd/otp,dgud/otp,getong/otp,emacsmirror/erlang,vladdu/otp,potatosalad/otp,jj1bdx/otp,vladdu/otp,bsmr-erlang/otp,aboroska/otp,vinoski/otp,isvilen/otp,erlang/otp,electricimp/otp,dumbbell/otp,g-andrade/otp,RoadRunnr/otp,isvilen/otp,vladdu/otp,vinoski/otp,rlipscombe/otp,getong/otp,isvilen/otp,erlang/otp,g-andrade/otp,electricimp/otp,bjorng/otp,getong/otp,isvilen/otp,legoscia/otp,dgud/otp,electricimp/otp,aboroska/otp,vinoski/otp,ferd/otp,jj1bdx/otp,bjorng/otp,emacsmirror/erlang,kvakvs/otp,bjorng/otp,ferd/otp,mikpe/otp,g-andrade/otp,rlipscombe/otp,vladdu/otp,jj1bdx/otp,dumbbell/otp,dumbbell/otp,getong/otp,bjorng/otp,RoadRunnr/otp,lrascao/otp,emacsmirror/erlang,bsmr-erlang/otp,legoscia/otp,potatosalad/otp,ferd/otp,RoadRunnr/otp,vladdu/otp,electricimp/otp,rlipscombe/otp,ferd/otp,bsmr-erlang/otp,emacsmirror/erlang,uabboli/otp,bjorng/otp,bsmr-erlang/otp,ferd/otp,legoscia/otp,vinoski/otp,isvilen/otp,kvakvs/otp,g-andrade/otp,RoadRunnr/otp,uabboli/otp,getong/otp,kvakvs/otp,getong/otp,erlang/otp,bjorng/otp,bjorng/otp,vladdu/otp,electricimp/otp,potatosalad/otp,dumbbell/otp,ferd/otp,potatosalad/otp,emacsmirror/erlang,potatosalad/otp,lrascao/otp,uabboli/otp,emacsmirror/erlang,mikpe/otp,RoadRunnr/otp,lrascao/otp,potatosalad/otp,dgud/otp,potatosalad/otp,lrascao/otp,mikpe/otp,kvakvs/otp,dgud/otp,potatosalad/otp,jj1bdx/otp,lrascao/otp,mikpe/otp,jj1bdx/otp,getong/otp,uabboli/otp,lrascao/otp,vinoski/otp,dgud/otp,vladdu/otp