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
This change adds a layer of abstraction around the internal Docker APIs,
and eliminates all direct dependencies on Dockerfiles in the infrastructure.
A subsequent change will automated the generation of local images (with
efficient caching). Note that this change drops the use of bazel container
rules, as that experiment does not seem to be viable.
PiperOrigin-RevId: 308095430