Refactor: move disposing properties into the base class (#33740)

Moves more functionality to `base-component`, transferring the responsibility of disposal to parent class.
Each component, dusting disposal, sets its protected properties to `null`. So the same can be done in one place for all children components .

js/src/collapse.js

@@ -253,14 +253,6 @@ class Collapse extends BaseComponent {
     this._isTransitioning = isTransitioning
   }
 
-  dispose() {
-    super.dispose()
-    this._config = null
-    this._parent = null
-    this._triggerArray = null
-    this._isTransitioning = null
-  }
-
   // Private
 
   _getConfig(config) {