Move to new database vector extension

cnpg:
  main:
    enabled: true
    user: immich
    database: immich
    type: vectors
    cluster:
      initdb:
        postInitApplicationSQL:
        - CREATE EXTENSION IF NOT EXISTS cube;
        - CREATE EXTENSION IF NOT EXISTS earthdistance;
        - CREATE SCHEMA IF NOT EXISTS vectors;
        - ALTER DATABASE immich SET search_path TO "immich", public, vectors;
        - SET search_path TO "immich", public, vectors;
        - GRANT SELECT ON TABLE pg_vector_index_stat TO PUBLIC;
        - ALTER SCHEMA vectors OWNER TO immich;