Add i18n support for vulnerability exports

What does this MR do and why?

Related to issue https://jihulab.com/gitlab-cn/gitlab/-/issues/2306

Related to upstream MR: https://gitlab.com/gitlab-org/gitlab/-/merge_requests/111537

Add i18n support for vulnerability exports. The language of vulnerability report will change according to the user's preferred language.

Screenshots or screen recordings

Screenshots are required for UI changes, and strongly recommended for all other merge requests.

How to set up and validate locally

Numbered steps to set up and validate the change are strongly suggested.

MR acceptance checklist

This checklist encourages us to confirm any changes have been analyzed to reduce risks in quality, performance, reliability, security, and maintainability.

• I have evaluated the MR acceptance checklist for this MR.