radv: Switch to the new common vk_error helpers

Also, change every vk_error to use the closest object instead of
fetching all the way back to the instance.

Reviewed-by: Samuel Pitoiset <samuel.pitoiset@gmail.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/13045>

docs/envvars.rst

@@ -618,8 +618,6 @@ RADV driver environment variables
       force all allocated buffers to be referenced in submissions
    ``checkir``
       validate the LLVM IR before LLVM compiles the shader
-   ``errors``
-      display more info about errors
    ``forcecompress``
       Enables DCC,FMASK,CMASK,HTILE in situations where the driver supports it
       but normally does not deem it beneficial.