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

As described in #211 (comment), it's the name of TIER IV's logger.
I concern that it might not be suitable for the AWF because the AWF's configurations/interfaces should be generic and diagnostic names can be said to be interfaces of Autoware.

Purpose

To make Autoware's interfaces more generic so that people can easily use/extend it.

Possible approaches

• Rename it to be more generic.
• Remove the diagnostic and add it in the user's (TIER IV's) fork.

Definition of done

• Reach an agreement among software architects and core developers (@xmfcx @mitsudome-r @yukkysaito @ito-san @asana17 etc.).