Release Autoware 1.8.0

[mitsudome-r]

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

Release Autoware 1.8.0 and update autoware.repos file to reflect all the changes in each repositories.

Purpose

Release 1.8.0

Possible approaches

Release each repository and update autoware.repos file

Definition of done

• release autoware_core
• release autoware_universe
• release autoware_tools
• release autoware_launch
• Test Demos
• update repos file
• Release packages in ROS Buildfarm
• release documentation