Migrate utilities/generate_test_locales to PDM

[obulat]

Fixes

Related to #4166 by @dhruvkb

Description

This PR migrates the generate_test_locales to PDM.

Testing Instructions

Run ./ov just utilities/generate_test_locales/install and ./ov just utilities/generate_test_locales/run
See that the translation files in frontend/test are updated.

Checklist

• My pull request has a descriptive title (not a vague title likeUpdate index.md).
• My pull request targets the default branch of the repository (main) or a parent feature branch.
• My commit messages follow best practices.
• My code follows the established code style of the repository.
• I added or updated tests for the changes I made (if applicable).
• I added or updated documentation (if applicable).
• I tried running the project locally and verified that there are no visible errors.
• I ran the DAG documentation generator (ov just catalog/generate-docs for catalog
  PRs) or the media properties generator (ov just catalog/generate-docs media-props
  for the catalog or ov just api/generate-docs for the API) where applicable.

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[sarayourfriend]

One blocking comment, but also we need to delete the Pipfile and Pipfile.lock.

[krysal]

LGTM. I get a minor change among locales update for ar and es, but besides that, looks good!

The requested change was added