amd/common: move ac_shader_{binary,reloc} into r600 and rename

They are no longer used by radeonsi or radv.
10 jobs for !1220 with radv-rtld in 15 minutes and 4 seconds (queued for 23 seconds)
latest detached
Status Job ID Name Coverage
  Containers Build
passed debian #392079

00:00:25

 
  Build+Test
passed meson-clang #392081

00:09:18

passed meson-clover #392085

00:10:16

passed meson-main #392084

00:05:43

passed meson-swr-glvnd #392080

00:06:46

passed meson-vulkan #392086

00:02:54

passed scons-llvm #392088

00:05:28

passed scons-nollvm #392087

00:04:00

passed scons-swr #392082

00:08:56

passed scons-win64 #392083

00:09:39