[HAL/AMDGPU] Abstract profile device clock sampling

Move profiling clock-correlation sampling behind util/device_clock. The system object now owns a platform clock source instead of a raw KFD descriptor, logical devices sample through that source, and physical devices carry the HSA driver_uid without baking the Linux KFD name into the core device identity.

Keep util/kfd as the Linux ioctl transport. It now returns raw AMDKFD_IOC_GET_CLOCK_COUNTERS values, while device_clock owns the generic validation and source-type dispatch so future Windows or macOS HSA support has a named unavailable/source boundary instead of spreading platform branches through profiling consumers.

Emit clock-correlation chunks only for profiling data families that consume HSA/device timestamps. Host-only queue events, memory events, executable metadata, and device metrics no longer require a device clock source, which keeps unrelated profiling modes alive on platforms without an equivalent clock-correlation API.