Support destroy physicsMaterial (#2481)

* feat: support destroy physicsMaterial

packages/core/src/physics/PhysicsMaterial.ts

@@ -97,9 +97,9 @@ export class PhysicsMaterial {
   }
 
   /**
-   * @internal
+   * Destroy the material when the material is no be used by any shape.
    */
-  _destroy() {
+  destroy() {
     !this._destroyed && this._nativeMaterial.destroy();
     this._destroyed = true;
   }

tests/src/core/physics/PhysicsMaterial.test.ts

@@ -486,4 +486,12 @@ describe("PhysicsMaterial", () => {
     engine.sceneManager.activeScene.physics._update(1);
     expect(formatValue(boxEntity2.transform.position.z)).eq(0.57139);
   });
+
+  it("destroy", () => {
+    const physicsMaterial = new PhysicsMaterial();
+    physicsMaterial.destroy();
+    expect(() => {
+      physicsMaterial.bounciness = 1;
+    }).toThrowError();
+  });
 });