On malloc failure, or more likely a passed in pDataSize < pipeline cache
data size, we should return incomplete. Otherwise,
vk_pipeline_cache_object_serialize will assertion fail about the start not
being aligned.
Closes: #8868
Fixes: 591da98779 ("vulkan: Add a common VkPipelineCache implementation")
Reviewed-by: Faith Ekstrand <faith.ekstrand@collabora.com>
Reviewed-by: Samuel Pitoiset <samuel.pitoiset@gmail.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/22700>
(cherry picked from commit bc257928d7)
4514207d25