Reset migrations

Closes #1434 (closed)

• HStoreExtension in ponos 0001
• in users 0001

  CreateCollation(
            'case_insensitive',
            provider='icu',
            locale='und-u-ks-level2',
            deterministic=False,
        ),

• BtreeGistExtension in documents 0001-0003 (needed in 0003)
• CreateExtension('postgis') in images 0001
• CreateExtension('uuid-ossp') in documents 0001
• https://gitlab.com/teklia/arkindex/backend/-/merge_requests/1998/diffs in documents 0004

old_schema_clean: old/current migrations applied to a new empty db, old_schema is my very suspicious personal dev database

old_schema.sql

old_schema_clean.sql

new_schema.sql