I18n: Refactor crowdin workflow (#81571)

* refactor: crowdin config

* feat: add GH actions

* refactor: remove old GH action

* refactor: fix formatting issue

* refactor: adjust docs

* refactor: add changes after code review

* refactor: add changes after code review

* refactor: update CODEOWNERS file

crowdin.yml

@@ -2,7 +2,6 @@ files:
   - source: /public/locales/en-US/grafana.json
     translation: /public/locales/%locale%/%original_file_name%
     type: i18next_json
-pull_request_title: 'I18n: Crowdin sync'
-pull_request_labels:
-  - area/internationalization
-  - no-changelog
+# The following are pulled from env variables
+project_id_env: CROWDIN_PROJECT_ID
+api_token_env: CROWDIN_PERSONAL_TOKEN