feat: add openSUSE tumbleweed detection and scanning

[msmeissn]

Description

This adds openSUSE Tumbleweed support. Tumbleweed is a rolling release, it has no version and currently no EOL.

The CVRF data is in the same location as the openSUSE Leap data.

The os detector is already detecting it.

Related issues

• Close https://github.com/aquasecurity/trivy-db/issues/410

Related PRs

• [ ] https://github.com/aquasecurity/trivy-db/pull/411

Checklist

• [x] I've read the guidelines for contributing to this repository.
• [x] I've followed the conventions in the PR title.
• [ ] I've added tests that prove my fix is effective or that my feature works.
• [x] I've updated the documentation with the relevant information (if needed).
• [x] I've added usage information (if the PR introduces new options)
• [x] I've included a "before" and "after" example to the description (if the PR is a user interface change).