Add tooltip with help docs to license scanning widget

What does this MR do and why?

Adds hover over tooltip to license scanning MR widget with link to docs.

Add tooltip with help docs to license scanning widget

• Added tooltip to be consistent with other widgets

Changelog: changed

MR acceptance checklist

Please evaluate this MR against the MR acceptance checklist. It helps you analyze changes to reduce risks in quality, performance, reliability, security, and maintainability.

Screenshots or screen recordings

Screenshots are required for UI changes, and strongly recommended for all other merge requests.

Before	After

How to set up and validate locally

1. Import the https://gitlab.com/gitlab-examples/security/security-reports project and run the pipeline on master and then from a MR that introduces new licenses.

Related to #356339 (closed)