🐛fix(controller): use generic WaitForSync

There is already support for defining `TypedSyncingSource` but the original code still checks for the original `SyncingSource` before callign `WaitForSync(ctx)` which does not work for custom typed controller.

this fix should be backported to v0.19

Author: tareksha

pkg/internal/controller/controller.go

@@ -200,7 +200,7 @@ func (c *Controller[request]) Start(ctx context.Context) error {
 						sourceStartErrChan <- err
 						return
 					}
-					syncingSource, ok := watch.(source.SyncingSource)
+					syncingSource, ok := watch.(source.TypedSyncingSource[request])
 					if !ok {
 						return
 					}