Add translation Merge Request Template for localization - Runner

What does this MR do?

We are currently working on removing the current dependency on using a fork based architecture (here's our Production fork for charts). Once translation is completed, for the inbound, we use GitLab-Argo Bot (with Developer role) that would automatically create Translation Merge Requests back to the current upstream repository. Below is a list of all the Translation MRs that has been created for this upstream project. As a part of this process we're currently adding couple of Merge Request templates that will be used by the GitLab-Argo Bot while building those Translation Merge Requests.

We've already completed this change for Docs production upstream (see the new template here and the Merge request here & here) and it has been verified and tested with a complete round-trip translation request with our third-party vendor tool-chain.

For reference, here's all the forked docs project and all of their MRs currently processed for https://docs.gitlab.com/ja-jp

Project List of MRs
Charts List of all Translation MRs for Charts
Operator List of all Translation MRs for Operator
Omnibus List of all Translation MRs for Omnibus
Runner List of all Translation MRs for Runner
Docs List of all Translation MRs for Docs
GitLab List of all Translation MRs for GitLab

What are the relevant issue numbers?

gitlab-com/localization/docs-site-localization#899 (closed)

Merge request reports

Loading