Revert "4 cpus is the max (#30696)" (#30697)
Revert "4 cpus is the max (#30696)" (#30697)

This reverts commit 75c780039b0c378f4cda21e148c32d005711d938.
stanley-cheung/grpc,stanley-cheung/grpc,jtattermusch/grpc,jtattermusch/grpc,grpc/grpc,jtattermusch/grpc,grpc/grpc,stanley-cheung/grpc,jtattermusch/grpc,jtattermusch/grpc,grpc/grpc,stanley-cheung/grpc,grpc/grpc,stanley-cheung/grpc,jtattermusch/grpc,jtattermusch/grpc,jtattermusch/grpc,stanley-cheung/grpc,stanley-cheung/grpc,stanley-cheung/grpc,grpc/grpc,stanley-cheung/grpc,jtattermusch/grpc,grpc/grpc,jtattermusch/grpc,stanley-cheung/grpc,grpc/grpc,stanley-cheung/grpc,grpc/grpc,stanley-cheung/grpc,grpc/grpc,grpc/grpc,jtattermusch/grpc,grpc/grpc,jtattermusch/grpc,grpc/grpc