Shifted numbering of migrations for Group,Type -> Group,Pipeline,Search

gracedb/migrations/0021_auto__add_search__add_pipeline.py

gracedb/migrations/0022_load_initial_pipelines.py

gracedb/migrations/0023_load_initial_searches.py

...auto__add_field_event_pipeline__add_field_event_search.py

...edb/migrations/0025_populate_event_pipeline_and_search.py

...edb/migrations/0026_auto__del_field_event_analysisType.py

gracedb/migrations/0027_auto__del_field_event_uid.py