Fix deprecated datetime.datetime.utcnow() uses within Pipeline1

Description

These code changes are transparent updates to the deprecated uses of datetime.datetime.utcnow() within Pipeline1's build stage. There should be no changes to the values in it's current state.

Risk

Accidental change to any of the times utilized within the build stage in pipeline1

Rollback Plan

Revert the merge request

Testing

Tested that the updated datetimes output the same values as the previously deprecated uses.