Standardize docs reference of Secure templates to Security/*.gitlab.ci.yml

We should standardize on referencing the Secure vendored templates to the format of Security/*.gitlab.ci.yml in our documentation. While either format will work for Ultimate users, the inclusion of Security to reference the full path is necessary for these templates to work for Core users, so we should standardize on the full path.

Currently, the documentation is inconsistent in how we reference them.

As an example https://docs.gitlab.com/ee/user/application_security/sast/index.html sometimes uses

template: Security/SAST.gitlab-ci.yml

and sometime it’s

template: SAST.gitlab-ci.yml

The following templates need to checked to make sure references to them are standardized and/or updated appropriately.

• Security/API-Fuzzing.gitlab-ci.yml
• Security/Container-Scanning.gitlab-ci.yml
• Security/Coverage-Fuzzing.gitlab-ci.yml
• Security/DAST.gitlab-ci.yml
• Security/Dependency-Scanning.gitlab-ci.yml
• Security/License-Management.gitlab-ci.yml
• Security/License-Scanning.gitlab-ci.yml
• Security/SAST.gitlab-ci.yml - !43011 (merged)
• Security/Secret-Detection.gitlab-ci.yml
• Security/Secure-Binaries.gitlab-ci.yml