Add installation command for drawer

...unner/admin_register_runner/admin_register_runner_app.vue

...ts/ci/runner/components/registration/platforms_drawer.vue

...ner/components/registration/registration_instructions.vue

...i/runner/components/registration/scripts/linux/install.sh

.../ci/runner/components/registration/scripts/osx/install.sh

...unner/components/registration/scripts/windows/install.ps1

...ts/javascripts/ci/runner/components/registration/utils.js

app/assets/javascripts/ci/runner/constants.js

config/webpack.config.js

jest.config.base.js

locale/gitlab.pot

...r/admin_register_runner/admin_register_runner_app_spec.js

.../components/registration/__snapshots__/utils_spec.js.snap

...i/runner/components/registration/platforms_drawer_spec.js

...components/registration/registration_instructions_spec.js

.../frontend/ci/runner/components/registration/utils_spec.js