vk/meta: Support VkShaderExt objects to allow tracking internal shaders

PanVK has a few internal shaders that don't fit in the vk_meta
compute/graphics pipeline model. Teaching vk_meta about VkShaderEXT
allows us to keep track of those internal shaders without using yet
another hash table.

Signed-off-by: Boris Brezillon <boris.brezillon@collabora.com>
Reviewed-by: Faith Ekstrand <faith.ekstrand@collabora.com>
Reviewed-by: Mary Guillemard <mary.guillemard@collabora.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/31441>

src/vulkan/runtime/vk_meta_object_list.c

@@ -35,6 +35,9 @@ vk_meta_destroy_object(struct vk_device *device, struct vk_object_base *obj)
    case VK_OBJECT_TYPE_SAMPLER:
       disp->DestroySampler(_device, (VkSampler)(uintptr_t)obj, NULL);
       break;
+   case VK_OBJECT_TYPE_SHADER_EXT:
+      disp->DestroyShaderEXT(_device, (VkShaderEXT)(uintptr_t)obj, NULL);
+      break;
    default:
       unreachable("Unsupported object type");
    }