Fix rocminfo when run within docker environments.

[iotamudelta]

Currently, rocminfo will fail when executed inside a docker container due to a missing ROCk module. This has impacts on rocprofiler use. However, a missing ROCk module is expected within a docker environment.

Fix this by searching for the "docker" string within the self-cgroups. If it is found, we do not error on a missing ROCk module.

[fxkamd]

All the whitespace patches should be squashed into the original patch.

As an alternative idea, instead of looking for amdgpu in lspci, can the container see the directory /sys/module/amdgpu?

[iotamudelta]

@fxkamd that directory is visible from within the container environment

[iotamudelta]

Abandon this solution in favor of the superior solution suggested by @fxkamd and implemented in #49