GroundPrimitive texture coordinates incorrect across IDL


This only happens with ground primitives with materials that cross the IDL.

```js
var viewer = new Cesium.Viewer('cesiumContainer', {scene3DOnly: true});

var rotation = Cesium.Math.toRadians(30);

function getRotationValue() {
rotation += 0.005;
return rotation;
}
viewer.entities.add({
name: 'Rotating rectangle with rotating texture coordinate',
rectangle: {
coordinates: Cesium.Rectangle.fromDegrees(-169.0, 30.0, -160.0, 40.0),
material: '../images/Cesium_Logo_Color.jpg',
rotation: new Cesium.CallbackProperty(getRotationValue, false),
stRotation: new Cesium.CallbackProperty(getRotationValue, false),
classificationType : Cesium.ClassificationType.TERRAIN
}
});

viewer.entities.add({
name: 'Rotating rectangle with rotating texture coordinate',
rectangle: {
coordinates: Cesium.Rectangle.fromDegrees(-179.0, 30.0, -170.0, 40.0),
material: '../images/Cesium_Logo_Color.jpg',
rotation: new Cesium.CallbackProperty(getRotationValue, false),
stRotation: new Cesium.CallbackProperty(getRotationValue, false),
classificationType : Cesium.ClassificationType.TERRAIN
}
});

viewer.zoomTo(viewer.entities);
```

cc @likangning93

Start by running the provided Cesium.Viewer reproduction with the two GroundPrimitive-backed rectangles and compare their texture coordinates as they cross the IDL. Trace the ground primitive rendering path for rotating materials; done means both rectangles render their textures correctly across the IDL without the shown distortion.

Written by the indexing model from the issue text.