Move EE spec mock data files to the corresponding CE file

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The following discussion from !14520 (merged) should be addressed:

• @pslaughter started a discussion:

  tech debt: I just realized that this copy is in ee/ while the source is not 😞... Unfortunately, it will not be that easy to import from spec/frontend while in ee/spec/frontend so I think this is something we should handle in a follow up MR. I'll create an issue for this.

In addition, we will also need to support something like a spec alias in our Jest config.