Fix update SpriteAtlas loading logic

[cptbtptpbcptdtptp]

• When loading Sprites, get them from the SpriteAtlas first.
• Discard _assetID attribute.
• Add export options.(mipmap, wrapModeV, wrapModeU, filterMode, anisoLevel)

[singlecoder]

+1

[cptbtptpbcptdtptp]

Test code.

/**
 * @title Scene Basic
 * @category Basic
 */
// Import Modules
import { AssetType, Scene, WebGLEngine } from "oasis-engine";
const engine = new WebGLEngine("canvas");

engine.resourceManager
  .load<Scene>({
    type: AssetType.Scene,
    url: "https://mmtcdp.stable.alipay.net/oasis_be/afts/file/A*75IDSaeFEFkAAAAAAAAAAAAADt53AQ/scene.json",
  })
  .then((scene: Scene) => {
    engine.canvas.resizeByClientSize();
    engine.sceneManager.activeScene = scene;
    // Run Engine
    engine.run();
  });