feat(Executor): make execute_any_executable public

Signed-off-by: Janosch Machowinski <J.Machowinski@cellumation.com>

Author: Janosch Machowinski

rclcpp/include/rclcpp/executor.hpp

@@ -470,6 +470,7 @@ class Executor
   void
   execute_any_executable(AnyExecutable & any_exec);
 
+public:
   /// Run subscription executable.
   /**
    * Do necessary setup and tear-down as well as executing the subscription.
@@ -507,6 +508,7 @@ class Executor
   static void
   execute_client(rclcpp::ClientBase::SharedPtr client);
 
+protected:
   /// Gather all of the waitable entities from associated nodes and callback groups.
   RCLCPP_PUBLIC
   void