Support GitHub repository security advisories

### Current Behavior

GitHub Advisories can be mirrored from the global list.
https://docs.github.com/en/rest/security-advisories/global-advisories?apiVersion=2022-11-28

However, repository security advisories are not aggregated in the global list. Instead, they have their own endpoints.
https://docs.github.com/en/rest/security-advisories/repository-advisories?apiVersion=2022-11-28

Therefore, GHSA-p7w6-62rq-vrf9 is not referenced in the global list, but in the repository one of eclipse-threadx/threadx.
https://github.com/advisories/GHSA-p7w6-62rq-vrf9 (not found)
https://github.com/eclipse-threadx/threadx/security/advisories/GHSA-p7w6-62rq-vrf9 (found)

### Proposed Behavior

GithubMetaAnalyzer, GitHubAdvisoryMirrorTask or a dedicated module, can mirror the repository advisories.

### Checklist

- [x] I have read and understand the [contributing guidelines](https://github.com/DependencyTrack/dependency-track/blob/master/CONTRIBUTING.md#filing-issues)
- [x] I have checked the [existing issues](https://github.com/DependencyTrack/dependency-track/issues) for whether this enhancement was already requested