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 #392079
debian

00:00:25

 
  Build+Test
passed #392081
meson-clang

00:09:18

passed #392085
meson-clover

00:10:16

passed #392084
meson-main

00:05:43

passed #392080
meson-swr-glvnd

00:06:46

passed #392086
meson-vulkan

00:02:54

passed #392088
scons-llvm

00:05:28

passed #392087
scons-nollvm

00:04:00

passed #392082
scons-swr

00:08:56

passed #392083
scons-win64

00:09:39