Fix generation of JS translations by dropping old locale folder

[hansegucker]

1. Every locale directory within the source base is considered as a directory for storing *.po files by makemessages [1]. This causes the djangojs.po file to be created in the wrong folder by ./manage.py translate. As a workaround, we can rename or remove our locale folder in the static files.
2. Select2 was dropped in Replace select2 with TomSelect #1758, so we can just remove the leftover localization files for that. The moment_de.js file is just included once in the datetimepicker html file, so we can change its path there.

[1] https://github.com/django/django/blob/main/django/core/management/commands/makemessages.py#L565

[richardebeling]

Code is looking good, works for me locally (after ensuring that the the locale folder was indeed removed and not kept because there is an untracked old djangojs.po in there), thanks!

[janno42]

Thanks! 👍

[richardebeling]

thanks :)

[hansegucker]

🥳