[Leaflet] Added typing for Control.extend method (#36650)

* fix(leaflet): add definition for Control.extend

* Revert "fix(leaflet): add definition for Control.extend"

This reverts commit e06f3d8ae01253db95323f48b35cd03d524cebde.

* fix(leaflet): add definition for Control.extend

types/leaflet/index.d.ts

@@ -1042,6 +1042,7 @@ export interface ControlOptions {
 }
 
 export class Control extends Class {
+    static extend<T extends object>(props: T): {new(...args: any[]): T} & typeof Control;
     constructor(options?: ControlOptions);
     getPosition(): ControlPosition;
     setPosition(position: ControlPosition): this;