Merge branch 'dependency-scanning-deduplicate-transitive-and-search-limit-docs' into 'master'

Deduplicate "transitive" and search "levels" notes about Dependency Scanning

See merge request https://gitlab.com/gitlab-org/gitlab/-/merge_requests/179386



Merged-by: Russell Dickenson <rdickenson@gitlab.com>
Approved-by: Russell Dickenson <rdickenson@gitlab.com>
Co-authored-by: Katrin Leinweber <kleinweber@gitlab.com>