Merge branch '421138_include_each_batch_to_export_relations' into 'master'

Adding eachBatch so project exporter can iterate through records

See merge request https://gitlab.com/gitlab-org/gitlab/-/merge_requests/133486



Merged-by: George Koltsov <gkoltsov@gitlab.com>
Approved-by: George Koltsov <gkoltsov@gitlab.com>
Co-authored-by: Max Fan <mfan@gitlab.com>

(cherry picked from commit b6fe9a15)

2e9a8e56 Adding eachBatch so project exporter can iterate through records