Fix intermittent spec failures in spec/finders/pipelines_finder_spec.rb
Fix intermittent spec failures in spec/finders/pipelines_finder_spec.rb

The spec was trying to sort pipelines by user ID, but the same user ID
was being used for each pipeline in the spec. This is similar to #33001.

jirutka/gitlabhq,mmkassem/gitlabhq,stoplightio/gitlabhq,dplarson/gitlabhq,iiet/iiet-git,jirutka/gitlabhq,axilleas/gitlabhq,stoplightio/gitlabhq,t-zuehlsdorff/gitlabhq,axilleas/gitlabhq,stoplightio/gitlabhq,stoplightio/gitlabhq,jirutka/gitlabhq,t-zuehlsdorff/gitlabhq,dplarson/gitlabhq,mmkassem/gitlabhq,mmkassem/gitlabhq,dplarson/gitlabhq,dreampet/gitlab,dplarson/gitlabhq,iiet/iiet-git,axilleas/gitlabhq,iiet/iiet-git,t-zuehlsdorff/gitlabhq,iiet/iiet-git,dreampet/gitlab,jirutka/gitlabhq,axilleas/gitlabhq,t-zuehlsdorff/gitlabhq,mmkassem/gitlabhq,dreampet/gitlab,dreampet/gitlab