broadcom/compiler: update image store lowering to use v71 new packing/conversion instructions

Vulkan shaderdb stats with pattern dEQP-VK.image.*.with_format.*.*:
   total instructions in shared programs: 35993 -> 33245 (-7.63%)
   instructions in affected programs: 21153 -> 18405 (-12.99%)
   helped: 394
   HURT: 1
   Instructions are helped.

   total uniforms in shared programs: 8550 -> 7418 (-13.24%)
   uniforms in affected programs: 5136 -> 4004 (-22.04%)
   helped: 399
   HURT: 0
   Uniforms are helped.

   total max-temps in shared programs: 6014 -> 5905 (-1.81%)
   max-temps in affected programs: 473 -> 364 (-23.04%)
   helped: 58
   HURT: 0
   Max-temps are helped.

   total nops in shared programs: 1515 -> 1504 (-0.73%)
   nops in affected programs: 46 -> 35 (-23.91%)
   helped: 14
   HURT: 2
   Inconclusive result (%-change mean confidence interval includes 0).

FWIW, that one HURT on the instructions count is for just one
instruction.

Reviewed-by: Iago Toral Quiroga <itoral@igalia.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/25726>
4 files changed