PR #25676: [ROCm] Adding ROCm support for code in the tensorflow/core/common_runtime/gpu directory

Imported from GitHub PR #25676

This PR contains commits to add ROCm support for code within the directory
     `tensorflow/core/common_runtime/gpu`

Prior to this PR the gpu implementation specific code within that dir is for CUDA only, and this PR adds the ROCm equivalent.

Some files/variables have been renamed from *cuda* to *gpu* to make code more generic

The PR is broken down into several commits for ease-of-review.  I can squash them into one prior to the merge if need be.

@tatianashp. Adding you to the cc-list just as an FYI
@whchung

Copybara import of the project:

  - c62c032d92e17a775db791ad03ae3502ea6d8e8e adding ROCm support in tensorflow/core/common_runtime/gpu... by Deven Desai <deven.desai.amd@gmail.com>
  - e94e3f408d9956dfa3aa7849a4ff41c584a6e0f0 adding ROCm support in tensorflow/core/common_runtime/gpu... by Deven Desai <deven.desai.amd@gmail.com>
  - 96e522ddf21fa675308a38b91d0a95efd771033e adding ROCm support in tensorflow/core/common_runtime/gpu... by Deven Desai <deven.desai.amd@gmail.com>
  - 929bbc2d4c620e31b2f7786600f4d7a271de0dba renaming cuda_host_allocator.h to gpu_host_allocator.h by Deven Desai <deven.desai.amd@gmail.com>
  - 4e255e01d26f74e003c11a894ebf39fcaf64ca49 misc changes by Deven Desai <deven.desai.amd@gmail.com>
  - a11b8117f1b27ba7f1abd43c4849e29d21c610d2 changes requested in the code review by Deven Desai <deven.desai.amd@gmail.com>
  - 07b49644d27aeac2e8646609640206faf5908ca5 using string instead int std::string + removing the #defi... by Deven Desai <deven.desai.amd@gmail.com>
  - 46bc499856a769cd00e9ddcdf5c922e3c17f0603 Merge 07b49644d27aeac2e8646609640206faf5908ca5 into afab5... by Deven Desai <36858332+deven-amd@users.noreply.github.com>

COPYBARA_INTEGRATE_REVIEW=https://github.com/tensorflow/tensorflow/pull/25676 from ROCmSoftwarePlatform:google_upstream_common_runtime_changes 07b49644d27aeac2e8646609640206faf5908ca5
PiperOrigin-RevId: 237437557