Added metadata to Secure docs

- This MR adds metadata to several of the Secure group's
  documentation files. The metadata is intended to guide
  Support and others to the relevant writer.

doc/user/application_security/configuration/index.md

 ---
 type: reference, howto
+stage: Secure
+group: Static Analysis
+info: To determine the technical writer assigned to the Stage/Group associated with this page, see https://about.gitlab.com/handbook/engineering/ux/technical-writing/#designated-technical-writers
 ---
 
 # Security Configuration **(ULTIMATE)**

doc/user/application_security/container_scanning/index.md

 ---
 type: reference, howto
+stage: Defend
+group: Container Security
+info: To determine the technical writer assigned to the Stage/Group associated with this page, see https://about.gitlab.com/handbook/engineering/ux/technical-writing/#designated-technical-writers
 ---
 
 # Container Scanning **(ULTIMATE)**

doc/user/application_security/dependency_list/index.md

+---
+type: reference, howto
+stage: Secure
+group: Composition Analysis
+info: To determine the technical writer assigned to the Stage/Group associated with this page, see https://about.gitlab.com/handbook/engineering/ux/technical-writing/#designated-technical-writers
+---
+
 # Dependency List **(ULTIMATE)**
 
 > [Introduced](https://gitlab.com/gitlab-org/gitlab/-/issues/10075) in [GitLab Ultimate](https://about.gitlab.com/pricing/) 12.0.

doc/user/application_security/dependency_scanning/index.md

 ---
 type: reference, howto
+stage: Secure
+group: Composition Analysis
+info: To determine the technical writer assigned to the Stage/Group associated with this page, see https://about.gitlab.com/handbook/engineering/ux/technical-writing/#designated-technical-writers
 ---
 
 # Dependency Scanning **(ULTIMATE)**

doc/user/application_security/offline_deployments/index.md

 ---
 type: reference, howto
+stage: Secure
+group: Static Analysis
+info: To determine the technical writer assigned to the Stage/Group associated with this page, see https://about.gitlab.com/handbook/engineering/ux/technical-writing/#designated-technical-writers
 ---
 
 # Offline environments

doc/user/application_security/secret_detection/index.md

 ---
 type: reference, howto
+stage: Secure
+group: Static Analysis
+info: To determine the technical writer assigned to the Stage/Group associated with this page, see https://about.gitlab.com/handbook/engineering/ux/technical-writing/#designated-technical-writers
 ---
 
 # Secret Detection **(ULTIMATE)**

doc/user/application_security/threat_monitoring/index.md

 ---
 type: reference, howto
+stage: Defend
+group: Container Security
+info: To determine the technical writer assigned to the Stage/Group associated with this page, see https://about.gitlab.com/handbook/engineering/ux/technical-writing/#designated-technical-writers
 ---
 
 # Threat Monitoring **(ULTIMATE)**

doc/user/application_security/vulnerabilities/index.md

 ---
 type: reference, howto
+stage: Secure
+group: Vulnerability Research
+info: To determine the technical writer assigned to the Stage/Group associated with this page, see https://about.gitlab.com/handbook/engineering/ux/technical-writing/#designated-technical-writers
 ---
 
 # Standalone Vulnerability pages

doc/user/compliance/license_compliance/index.md

 ---
 type: reference, howto
+stage: Secure
+group: Composition Analysis
+info: To determine the technical writer assigned to the Stage/Group associated with this page, see https://about.gitlab.com/handbook/engineering/ux/technical-writing/#designated-technical-writers
 ---
 
 # License Compliance **(ULTIMATE)**