[HAL/AMDGPU] Track upload ring reclaim positions

Extend notification-ring reclaim entries so queue-owned upload bytes can retire through the same completion epoch as kernargs. The new reclaim-position API reports both kernarg and upload ring watermarks, while the existing kernarg-only wrappers remain for current callers and tests that do not care about upload storage.

Thread the upload watermark through kernel-shaped host queue submissions, including the failed-submission noop path that plugs already-reserved AQL slots. Host queue drain and teardown now reclaim all queue-owned ring positions through one helper; the upload watermark stays zero until a submission path actually allocates upload spans, so static command-buffer replay remains untouched.

Add notification-ring coverage for reporting both queue-owned watermarks across zero-signal epochs.