[HAL/AMDGPU] Centralize physical topology edge selection

Move the physical source/destination topology edge decision table into physical_device_capabilities.*, separating HSA fact collection from policy selection. logical_device.c now queries memory-pool access and link-hop records, then feeds a pure selector that records coarse/fine access, grant-required peer access, PCIe/xGMI/etc link flags, coherency, 32-bit and 64-bit atomics, link class/cost/NUMA distance, and derived HAL topology modes/capabilities.

This keeps the queue, command-buffer, and copy hot paths free of new buffer-snooping or recurring validation while giving future SDMA/P2P strategy selection named cold-path facts to consume. Unsupported copy strategies remain feature slots rather than implicit queue-path branches.

Add synthetic coverage for xGMI, PCIe without coherent/system-atomic support, multi-hop worst-case collapse, grant-required peer memory, no-access host-staged fallback, and invalid HSA fact inputs.