grpc is released into kinetic and melodic but that is going to conflict with the system version.

This was flagged in #19184 and talking with the maintainer @BillWSY we talked about reducing the ROS packages to just provide the extras that are not in the upstream repositories: #19184 (comment)

For reference the Melodic PR: #19185

And an incoming rosdep key which will trigger the collision #19292

@BillWSY Would you be able to switch this to the stripped down version soon?