Report Widgets Core: Add support for status icons Level 1

Context

This is part of the epic: &6647 (closed) that adds support for the Design Guidelines to the Core component of MR Report Widgets.

All this is in the context of the Working Group: Merge Request Report Widgets.

Required reading

Please ensure that:

• all the code written implements the rules of Accessibility https://design.gitlab.com/regions/merge-request-reports#accessibility
• you're familiar with the overall goal https://www.figma.com/file/qEddyqCrI7kPSBjGmwkZzQ/Component-library?node-id=38193%3A30482

Level 1 icons

See https://design.gitlab.com/regions/merge-request-reports#level-1-2