Fix buffer usage validity (#4586)

A usage of 0 is not allowed by the spec, setting it to `GPUBufferUsage.STORAGE` should get this test working properly.

Author: teoxoy

src/webgpu/api/validation/buffer/mapping.spec.ts

@@ -413,7 +413,7 @@ g.test('mapAsync,abort_over_invalid_error')
     const { mapMode, unmapBeforeResolve } = t.params;
     const bufferSize = 8;
     const buffer = t.createBufferTracked({
-      usage: 0,
+      usage: GPUBufferUsage.STORAGE,
       size: bufferSize,
     });