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Draft: anv: Remove GRL support

Kevin Chuang requested to merge kaiwenjon/mesa:review/drop-grl-support into main

This MR removes the compiling options and source files of GRL. Once !31588 (merged) is merged and we concluded GRL is no longer needed, this MR can be landed.

The benefits of removing GRL:

  1. GRL is tailored for Windows, and removing it eliminates the need to port driver changes between Windows and Linux.
  2. The framework and the new intel debug tool allows us to debug BVH more efficiently. We've made more titles to work.
  3. Other drivers are using the framework as well. Doing this ensures the alignment with the community.

With this change, intel-bvh-grl is no longer valid. If users enable intel-rt, the common-framework will be the only support for bvh building in anv.

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