[HAL/AMDGPU] Disable queue upload rings by default

Queue-control upload rings are intended for device-side command-buffer fixup and future device-queue control records, but there is no production consumer in the current landing slice. Allocating 64 KiB of HSA memory for every host queue is therefore future-strategy storage on the default path.

Make the default upload capacity zero and treat zero as an explicit disabled state at the logical, physical, and host queue option boundaries. Non-zero capacities still have the same power-of-two contract, and the queue only initializes the upload ring when a caller opts in.

This keeps the upload ring utility and reclaim plumbing available for the device-side fixup work without charging ordinary dispatch or static command-buffer replay for an unused per-queue allocation.