vertex_buffer_OOB: more subcases per case

This helps a lot in standalone (18s -> 12s) but it probably won't help
quite as much in other modes.

src/webgpu/api/validation/encoding/cmds/render/draw.spec.ts

@@ -408,15 +408,15 @@ success/error as expected. Such set of buffer parameters should include cases li
       .combine('VBSize', ['zero', 'exile', 'enough'] as const)
       // the state of instance step mode vertex buffer bound size
       .combine('IBSize', ['zero', 'exile', 'enough'] as const)
+      // the state of array stride
+      .combine('AStride', ['zero', 'exact', 'oversize'] as const)
+      .beginSubcases()
       // should the vertex stride count be zero
       .combine('VStride0', [false, true] as const)
       // should the instance stride count be zero
       .combine('IStride0', [false, true] as const)
-      // the state of array stride
-      .combine('AStride', ['zero', 'exact', 'oversize'] as const)
       // the factor for offset of attributes in vertex layout
       .combine('offset', [0, 1, 2, 7]) // the offset of attribute will be factor * MIN(4, sizeof(vertexFormat))
-      .beginSubcases()
       .combine('setBufferOffset', [200]) // must be a multiple of 4
       .combine('attributeFormat', ['snorm8x2', 'float32', 'float16x4'] as GPUVertexFormat[])
       .expandWithParams(p =>