Automatic merge from submit-queue (batch tested with PRs 40665, 41094, 41351, 41721, 41843)

Update i18n tools and process.

@fabianofranz @zen @kubernetes/sig-cli-pr-reviews 

This is an update to the translation process based on feedback from folks.

The main changes are:
   * `msgctx` is being removed from the files.
   * String wrapping and string extraction have been separated.
   * More tools from the `gettext` family of tools are being used
   * Extracted strings are being sorted for canonical ordering
   * A `.pot` template has been added.