PR #13068: Introduce the Blackwell compute capability.
PR #13068: Introduce the Blackwell compute capability.

Imported from GitHub PR https://github.com/openxla/xla/pull/13068

Introduce the Blackwell compute capability. Future Blackwell-specific changes can be guarded by this capability.
Copybara import of the project:

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cc1adebc95166b2d3979cc01de954a1895515ad4 by Dimitris Vardoulakis <dvardoulakis@nvidia.com>:

Introduce the Blackwell compute capability. Future Blackwell-specific changes can be guarded by this capability.

Merging this change closes #13068

FUTURE_COPYBARA_INTEGRATE_REVIEW=https://github.com/openxla/xla/pull/13068 from dimvar:dv-create-blackwell-cc cc1adebc95166b2d3979cc01de954a1895515ad4
