Go profiling was removed from runsc debug in a previous change. PiperOrigin-RevId: 328203826
Also removes `--profile-goroutine` because it's equivalent to `debug --stacks`. PiperOrigin-RevId: 325061502
Adds profiling with `runsc debug` or pprof to dockerutil. All targets using dockerutil should now be able to use profiling. In addition, modifies existing benchmarks to use profiling. PiperOrigin-RevId: 323298634