[Fixes #11579] Use autocomplete API for editing linked resources (#11584)

geonode/base/forms.py

geonode/base/tests.py

geonode/base/urls.py

geonode/base/views.py

geonode/documents/templates/documents/document_metadata.html

geonode/documents/templates/layouts/doc_panels.html

geonode/documents/tests.py

geonode/geoapps/templates/apps/app_metadata.html

geonode/geoapps/templates/layouts/app_panels.html

geonode/layers/templates/datasets/dataset_metadata.html

geonode/layers/templates/layouts/panels.html

geonode/locale/it/LC_MESSAGES/django.mo

geonode/locale/it/LC_MESSAGES/django.po

geonode/maps/templates/layouts/map_panels.html

geonode/maps/templates/maps/map_metadata.html