[flag] Add new THEROCK_FLAG_INCLUDE_PROFILER flag.

[stellaraccident]

• Replaces earlier hard-coded if(WIN32) style logic.
• Being able to control this at the top level has proven useful for various system bringup tasks.

[marbre]

I am undecided whether this should make its way into our docs somewhere. This does not seem to fit to https://github.com/ROCm/TheRock/blob/main/README.md#optional-configuration-flags (enable vs. include) and I am not sure we really want to document it user facing but there also isn't a good place in docs/development at the moment.

[stellaraccident]

I am undecided whether this should make its way into our docs somewhere. This does not seem to fit to https://github.com/ROCm/TheRock/blob/main/README.md#optional-configuration-flags (enable vs. include) and I am not sure we really want to document it user facing but there also isn't a good place in docs/development at the moment.

I think it is fine as just available in the CMakeLists for people in the know. It is a special purpose knob.