feat: remove all custom controls

Author: paodb

src/main/java/com/flowingcode/vaadin/addons/googlemaps/GoogleMap.java

@@ -820,6 +820,14 @@ public void removeCustomControl(CustomControl customControl) {
     this.setCustomControls(this.customControls.stream().toArray(CustomControl[]::new));
   }
 
+  /**
+   * Removes all custom controls added to the map.
+   */
+  public void removeCustomControls() {
+    this.customControls.clear();
+    this.getElement().executeJs("this._removeCustomControls()");
+  }
+  
   /**
    * Adds a FullScreenEvent listener. The listener is called to notify whether the map is in full
    * screen mode.