Change MVKPhysicalDeviceMetalFeatures::dynamicMTLBuffers from boolean to uint dynamicMTLBufferSize limit and guard dynamic buffer usage sizes against it. Update VK_MVK_MOLTENVK_SPEC_VERSION to 23.
Change MVKPhysicalDeviceMetalFeatures::dynamicMTLBuffers from boolean to uint dynamicMTLBufferSize limit and guard dynamic buffer usage sizes against it. Update VK_MVK_MOLTENVK_SPEC_VERSION to 23.