Draft: Ci job auto update GraphQL compiled doc

What does this MR do and why?

We reset the GraphQL reference doc in JH through MR !754 (merged) .

The side effect of the method is that once the Upstream related API is updated, we have to manually update the documentation in jh/doc/api/graphql/reference/index.md.

The MR wants to handle this action automatically during the sync phase.

Doing this in https://jihulab.com/gitlab-cn/code-sync is a better option, but rake task of gitlab:graphql:compile_docs depends on Rails environment, code-sync cannot provide this support.

cc EM @prajnamas