intel/blorp: Allow gfx12 fast-clears without CCS surf
What does this MR do and why?
I'd like to phase out the ISL surface representation of CCS on gfx120 in
order to enable CCS without a 512B-aligned main surface pitch. Remove
the dependency on CCS ISL surfaces when fast-clearing to move drivers
one step towards that goal.
Ref: #10740