Update alpha/beta feature links to use local docs definition page

doc/administration/gitaly/index.md

doc/administration/gitaly/recovery.md

doc/administration/operations/fast_ssh_key_lookup.md

doc/api/project_import_export.md

doc/ci/cloud_services/google_cloud/index.md

doc/ci/cloud_services/index.md

doc/ci/runners/saas/macos_saas_runner.md

doc/ci/runners/saas/windows_saas_runner.md

doc/ci/variables/predefined_variables.md

doc/development/contributing/design.md

doc/development/documentation/styleguide/word_list.md

doc/user/admin_area/analytics/dev_ops_report.md

...user/application_security/cluster_image_scanning/index.md

doc/user/application_security/coverage_fuzzing/index.md

doc/user/application_security/dast/browser_based.md

doc/user/group/devops_adoption/index.md

doc/user/packages/package_registry/index.md

doc/user/profile/preferences.md

doc/user/project/clusters/serverless/index.md

doc/user/project/import/phabricator.md