Ensure `environment` keyword is defined on all `deploy` jobs in documentation (batch 7)

See Ensure `environment` keyword is defined on all ... (&8590 - closed) for more details

Implementation guide

Make sure that all stage: deploy jobs in the following documentation files are already have environment: keyword.

If some of them don't, then add the

environment: production

(substitute production to other environmens like dev or staging where it makes more sense).

doc/user/packages/container_registry/index.md
299:  stage: deploy

doc/user/packages/npm_registry/index.md
324:  stage: deploy

doc/user/packages/nuget_repository/index.md
399:     stage: deploy

doc/user/infrastructure/iac/mr_integration.md
140:  stage: deploy

doc/api/templates/gitlab_ci_ymls.md
138:  "content": "# This file is a template, and might need editing before it works on your project.\n# To contribute improvements to CI/CD templates, please follow the Development guide at:\n# https://docs.gitlab.com/ee/development/cicd/templates.html\n# This specific template is located at:\n# https://gitlab.com/gitlab-org/gitlab/-/blob/master/lib/gitlab/ci/templates/Ruby.gitlab-ci.yml\n\n# Official language image. Look for the different tagged releases at:\n# https://hub.docker.com/r/library/ruby/tags/\nimage: ruby:latest\n\n# Pick zero or more services to be used on all builds.\n# Only needed when using a docker container to run your tests in.\n# Check out: https://docs.gitlab.com/ee/ci/services/index.html\nservices:\n  - mysql:latest\n  - redis:latest\n  - postgres:latest\n\nvariables:\n  POSTGRES_DB: database_name\n\n# Cache gems in between builds\ncache:\n  paths:\n    - vendor/ruby\n\n# This is a basic example for a gem or script which doesn't use\n# services such as redis or postgres\nbefore_script:\n  - ruby -v  # Print out ruby version for debugging\n  # Uncomment next line if your rails app needs a JS runtime:\n  # - apt-get update -q \u0026\u0026 apt-get install nodejs -yqq\n  - bundle config set --local deployment true  # Install dependencies into ./vendor/ruby\n  - bundle install -j $(nproc)\n\n# Optional - Delete if not using `rubocop`\nrubocop:\n  script:\n    - rubocop\n\nrspec:\n  script:\n    - rspec spec\n\nrails:\n  variables:\n    DATABASE_URL: \"postgresql://postgres:postgres@postgres:5432/$POSTGRES_DB\"\n  script:\n    - rails db:migrate\n    - rails db:seed\n    - rails test\n\n# This deploy job uses a simple deploy flow to Heroku, other providers, e.g. AWS Elastic Beanstalk\n# are supported too: https://github.com/travis-ci/dpl\ndeploy:\n  stage: deploy\n  environment: production\n  script:\n    - gem install dpl\n    - dpl --provider=heroku --app=$HEROKU_APP_NAME --api-key=$HEROKU_PRODUCTION_KEY\n"

doc/topics/autodevops/customize.md
582:  stage: deploy