Added the ip and port as launch arguments in the ros2 launch file

[Elie-Y]

Proposed change(s)

Modified the ros2 launch file by adding the Ip and Port as launch arguments

Types of change(s)

• [ ] Bug fix
• [x] New feature
• [ ] Code refactor
• [ ] Documentation update
• [ ] Other (please describe)

Testing and Verification

I tested it using ROS2 Galactic, ros2 launch ros_tcp_endpoint endpoint.py ROS_IP:=127.0.0.1 ROS_TCP_PORT:=10001

Test Configuration:

• Unity Version: [e.g. Unity 2020.3.30f1]
• Unity machine OS + version: Linux mint 20.3 Cinnamon
• ROS machine OS + version: Linux mint 20.3 Cinnamon, ROS2 Galactic
• ROS–Unity communication: Direct, Docker

Checklist

• [x] Ensured this PR is up-to-date with the dev branch
• [x] Created this PR to target the dev branch
• [x] Followed the style guidelines as described in the Contribution Guidelines
• [ ] Added tests that prove my fix is effective or that my feature works
• [ ] Updated the Changelog and described changes in the Unreleased section
• [ ] Updated the documentation as appropriate

Other comments

[unity-cla-assistant]

All committers have signed the CLA.

[StephanHasler]

BTW: The naming of the parameters is inconsistent with the ROS1 version. There the parameters are tcp_ip and tcp_port. Also the internal variables are called likewise. See #123 why the ROS1 naming might be preferable.