Port tier4_planning_msgs to autoware_planning_msgs

[cyn-liu]

Checklist

• I've read the contribution guidelines.
• I've searched other issues and no duplicate issues were found.
• I've agreed with the maintainers that I can plan this task.

Description

Hi @mitsudome-r @xmfcx @youtalk
In Autoware.Universe to Autoware.Core Porting Activity, it is required that each package can only use messages defined under AutowareFoundation GitHub Org (e.g., autoware_msgs and autoware_internal_msgs).

In order to accelerate the porting process, we will move all messages from tier4_planning_msgs to autoware_planning_msgs. Next, we will replace all tier4_planning_msgs in Autoware.Universe with autoware_planning_msgs.

If everyone has no objections, I will start this work in the next few days.

Purpose

1. Move all still use messages from tier4_planning_msgs to autoware_planning_msgs.
2. Replace all tier4_planning_msgs in Autoware.Universe with autoware_planning_msgs.

Possible approaches

None.

Definition of done

None.