feat: standardize translation directory for i18n_tool

[shadinaif]

feat: standardize translation directory for i18n_tool

This PR prepares the repository to comply with openedx-translations by doing the following:

• Create conf/locale directory. This is the default used one in openedx-translations
• Make the translation command make extract_translations build a file named django.po . This is the entry command used in openedx-translations
• Remove translation in test files!
• Enable i18n translation in template files + fix a test that fails when i18n is enabled

• Tested on local devstack palm to ensure that everything renders fine
• Tested on local devstack palm to ensure that local translation still works no local translation exists in this repo

References

This pull request is part of the FC-0012 project which is sparked by the Translation Infrastructure update OEP-58.

Check the links above for full information about the overall project.

Internalization is being rearchitected in Open edX Python, XBlock, Micro-frontend, and other projects. There are a number of immediately visible changes:

• Remove source and language translations from the repositories, hence no .json, .po or .mo files will be committed into the repos.
• Add standardized make extract_translations in all repositories
• Push user-facing messages strings into openedx/openedx-translations.
• Integrate root repositories with openedx/openedx-atlas to pull translations on build/deploy time

Breaking Changes

One of the primary goals of the project is to avoid breaking changes. If you noticed any suspicious code, please raise your concern. But before that, please know the strategy we're following to avoid breaking changes

For XBlocks:

• The standard translation path must be conf/locale. Therefore, we are creating a link from conf/locale to translations so Atlas can find the path without disrupting the current way of having translations locally within the XBlocks
• openedx-translations will have a related PR that adds the XBlock to the pipeline. This will not affect the current way of managing/updating translations
• At the end of the project, a clear change log will be added and all translations will be handled by Atlas. Thus, the local translation will be removed from the repo within the version bump
• A notification for the community will be published to ensure that everyone knows why translations directories are removed from all repos

[openedx-webhooks]

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[shadinaif]

@OmarIthawi, @brian-smith-tcril this one is ready for your review. Thank you!

[OmarIthawi]

If this repo has no javascript translations, then this look good to me.

[OmarIthawi]

Great! ugettext makes no sense in testing. At least, wasn't a good way to test i18n.

[brian-smith-tcril]

LGTM!

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