Clarify that EMM Plugin only for mem allocs
Clarify that EMM Plugin only for mem allocs

Not for streams, events, modules, etc.

Co-Authored-By: stuartarchibald <bea6903cc29f240e46cd18ca8cb3cffc8245594f@users.noreply.github.com>
stonebig/numba,stuartarchibald/numba,numba/numba,stuartarchibald/numba,cpcloud/numba,numba/numba,cpcloud/numba,stuartarchibald/numba,seibert/numba,IntelLabs/numba,IntelLabs/numba,stonebig/numba,sklam/numba,numba/numba,numba/numba,numba/numba,seibert/numba,seibert/numba,stonebig/numba,cpcloud/numba,IntelLabs/numba,seibert/numba,IntelLabs/numba,cpcloud/numba,cpcloud/numba,sklam/numba,IntelLabs/numba,gmarkall/numba,stonebig/numba,gmarkall/numba,gmarkall/numba,stonebig/numba,gmarkall/numba,stuartarchibald/numba,seibert/numba,stuartarchibald/numba,sklam/numba,sklam/numba,sklam/numba,gmarkall/numba