Allow mimick patching of methods with up to 9 arguments.
Allow mimick patching of methods with up to 9 arguments.

This will be needed by the executor tests.

Signed-off-by: Chris Lalancette <281cd07d7578d97c83271fbbf2faddb83ab3791c@openrobotics.org>

ros2/rclcpp,ros2/rclcpp