Improve git datasource documentation including latest fields
Some fields are not documented.
This is a list of fields that must be documented:\
co_authored_by_multi_uuids
non_authored_co_authored_by_multi_uuids
merged_by_multi_uuids
non_authored_merged_by_multi_uuids
acked_by_multi_uuids
non_authored_acked_by_multi_uuids
approved_by_multi_uuids
approved_by_multi_uuids
tested_by_multi_uuids
non_authored_tested_by_multi_uuids
suggested_by_multi_uuids
non_authored_suggested_by_multi_uuids
signed_off_by_multi_uuids
non_authored_signed_off_by_multi_uuids
reviewed_by_multi_uuids
non_authored_reviewed_by_multi_uuids
reported_by_multi_uuids
non_authored_reported_by_multi_uuids
co_developed_by_multi_uuids
non_authored_co_developed_by_multi_uuids
co_authored_by_multi_uuids
non_authored_co_authored_by_multi_uuids
approved_by_multi_uuids
non_authored_approved_by_multi_uuids