radv: fix random depth range unrestricted failures due to a cache issue

radv: fix random depth range unrestricted failures due to a cache issue

The shader module name is used to compute the pipeline key. The
driver used to load the wrong pipelines because the shader names
were similar.

This should fix random failures of
dEQP-VK.pipeline.depth_range_unrestricted.*

Fixes: f11ea226664 ("radv: fix a performance regression with graphics depth/stencil clears")
Signed-off-by: Samuel Pitoiset <samuel.pitoiset@gmail.com>
Reviewed-by: Bas Nieuwenhuizen <bas@basnieuwenhuizen.nl>
Tested-by: Marge Bot <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/4216>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/4216>