Don't cache i18n json files in WDQS UI
Given that index.html and js files aren't cached, i18n files shouldn't be cached either, otherwise newly added messages will appear broken for a whle after deployment.
Bug: T397452
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Given that index.html and js files aren't cached, i18n files shouldn't be cached either, otherwise newly added messages will appear broken for a whle after deployment.
Bug: T397452