radeonsi: set amdgpu-gds-size attribute on shaders

This will be required for using GDS operations in shaders.
10 jobs for !1221 with gds-size in 7 minutes and 48 seconds (queued for 3 seconds)
latest detached
Status Job ID Name Coverage
  Containers Build
passed #392216
debian

00:00:18

 
  Build+Test
passed #392218
meson-clang

00:07:24

passed #392222
meson-clover

00:07:29

passed #392221
meson-main

00:04:17

passed #392217
meson-swr-glvnd

00:06:09

passed #392223
meson-vulkan

00:02:19

passed #392225
scons-llvm

00:02:28

passed #392224
scons-nollvm

00:04:13

passed #392219
scons-swr

00:05:09

passed #392220
scons-win64

00:06:07