WIP: intel/blorp: Align 16bpp surfaces to 8x8 while doing HZ_OP on Gen12+

Open Sagar Ghuge requested to merge sagarghuge/mesa:review/16bpp_align into main

For depth and HZ resolve pass, we need to align the surface to 8x8 pixels on Gen12+, which might improve performance.

@nchery suggested this change while looking at some other performance tasks.

Edited by Sagar Ghuge

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