Renamed coauthors -> entry_coauthors

docs/introduction.md

gui/src/components/entry/EditUserMetadataDialog.js

gui/src/components/uploads/UploadPage.js

nomad/app/v1/routers/entries.py

nomad/cli/client/integrationtests.py

nomad/datamodel/datamodel.py

nomad/metainfo/elasticsearch_extension.py

nomad/processing/data.py

tests/app/flask/test_dcat.py

tests/app/v1/routers/test_entries_edit.py

tests/conftest.py

tests/data/proc/examples_qcms.zip

tests/processing/test_data.py

tests/test_datamodel.py

tests/test_search.py