Fix the problem that there is no cleanup script when direct gc.

[cptbtptpbcptdtptp]

Please check if the PR fulfills these requirements

• The commit message follows our guidelines
• Tests for the changes have been added (for bug fixes / features)
• Docs have been added / updated (for bug fixes / features)

What kind of change does this PR introduce? (Bug fix, feature, docs update, ...)

What is the current behavior? (You can also link to an open issue here)

What is the new behavior (if this is a feature change)?

Does this PR introduce a breaking change? (What changes might users need to make in their application due to this PR?)

Other information:

[cptbtptpbcptdtptp]

Demo:

/**
 * @title Script Basic
 * @category Basic
 */
import {
  Camera,
  DirectLight,
  Entity,
  Script,
  WebGLEngine,
  Light,
  Scene
} from "@galacean/engine";

WebGLEngine.create({ canvas: "canvas" }).then((engine) => {
  engine.canvas.resizeByClientSize();
  const scene = engine.sceneManager.activeScene;
  const root = scene.createRootEntity("root");

  const cameraEntity = root.createChild("camera");
  cameraEntity.addComponent(Camera);
  cameraEntity.transform.setPosition(0, 0, 5);

  const lightEntity = root.createChild("light");
  lightEntity.addComponent(DirectLight);

  root.addComponent(TestScript);
  scene.destroy();
  engine.resourceManager.gc();
  engine.run();
});

class TestScript extends Script {
  onStart(): void {
    console.log("on start");
  }

  onUpdate(deltaTime: number): void {
    console.log("on update");
  }

  onLateUpdate(deltaTime: number): void {
    console.log("on late update");
  }

  onPhysicsUpdate(): void {
    console.log("on physics update");
  }
}

[GuoLei1990]

Entity destroy shouldn't dependent gc()

[GuoLei1990]

Delete this will cause performance problem

[GuoLei1990]

this._elements.length = this.length; can save memory

[GuoLei1990]

the same before

[GuoLei1990]

the same before

[GuoLei1990]

Fixed in: #1724