video_core/vulkan: Added `VkPipelineCache` to store Vulkan pipelines

As an optional feature which can be enabled in the advanced graphics configuration, all pipelines that get built at the initial shader loading are stored in a VkPipelineCache object and are dumped to the disk.

These vendor specific pipeline cache files are located at `/shader/GAME_ID/vulkan_pipelines.bin`. This feature was mainly added because of an issue with the AMD driver (see yuzu-emu#8507) causing invalidation of the cache files the driver builds automatically.