radv: fix compute pipeline keys when optimizations are disabled

radv: fix compute pipeline keys when optimizations are disabled

If an app first creates a compute pipeline with
VK_PIPELINE_CREATE_DISABLE_OPTIMIZATION_BIT set, then re-compile it
without that flag, the driver should re-compile the compute shader.
Otherwise, it will return the unoptimized one.

Fixes: ce188813bfe ("radv: add initial support for VK_PIPELINE_CREATE_DISABLE_OPTIMIZATION_BIT")
Signed-off-by: Samuel Pitoiset <samuel.pitoiset@gmail.com>
Reviewed-by: Bas Nieuwenhuizen <bas@basnieuwenhuizen.nl>