[Pallas] Add pl.get_global for global semaphore allocations #32467
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This pattern is meant to replace the pl.run_scoped with collective axes that include all the grid axes. Each call to pl.get_global in the body returns a unique allocation, but one that is consistent across all invocations of the body. PiperOrigin-RevId: 817551439
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[Pallas] Add pl.get_global for global semaphore allocations
This pattern is meant to replace the pl.run_scoped with collective axes that include all the grid axes. Each call to pl.get_global in the body returns a unique allocation, but one that is consistent across all invocations of the body.