PR #13018: [ROCm] Distinguish between AMD and NVIDIA GPUs with relevant tags
PR #13018: [ROCm] Distinguish between AMD and NVIDIA GPUs with relevant tags

Imported from GitHub PR https://github.com/openxla/xla/pull/13018

Add `requires-gpu-amd` for AMD gpus and unit tests that require AMD backend. Use `requires-gpu-nvidia` for any nvidia gpu backend.
Copybara import of the project:

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8c3c52760c37b6c9fc17910174df6bfa396b5b5e by Harsha HS <Harsha.HavanurShamsundara@amd.com>:

[ROCm] Distinguish between AMD and NVIDIA GPUs with relevant tags

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0bf9ab80d06284883df19f17f421eb6a691c0dd8 by Harsha HS <Harsha.HavanurShamsundara@amd.com>:

Change ALL_GPU_BACKENDS to GPU_BACKENDS

Merging this change closes #13018

FUTURE_COPYBARA_INTEGRATE_REVIEW=https://github.com/openxla/xla/pull/13018 from ROCm:ci_amdtags_20240523 0bf9ab80d06284883df19f17f421eb6a691c0dd8
