Docs: Updated metadata

Related to: https://gitlab.com/gitlab-org/gitlab/-/issues/230992

doc/development/build_test_package.md

+---
+stage: Enablement
+group: Distribution
+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
+---
+
 # Building a package for testing
 
 While developing a new feature or modifying an existing one, it is helpful if an

doc/development/packages.md

+---
+stage: Package
+group: Package
+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
+---
+
 # Packages
 
 This document will guide you through adding another [package management system](../administration/packages/index.md) support to GitLab.

doc/user/packages/workflows/monorepo.md

+---
+stage: Package
+group: Package
+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
+---
+
 # Monorepo package management workflows
 
 Oftentimes, one project or Git repository may contain multiple different

doc/user/packages/workflows/project_registry.md

+---
+stage: Package
+group: Package
+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
+---
+
 # Project as a package registry
 
 Using the features of the package registry, it is possible to use one project to store all of your packages.