Add support for PostgreSQL OID type

[sirex]

Traceback (most recent call last):
  File "spinta/manifests/sql/helpers.py", line 241, in _get_type
    raise TypeError(f"Unknown type {sql_type!r}.")
TypeError: Unknown type OID().

postgresql.OID type should be mapped to integer type.

Related

• https://github.com/atviriduomenys/spinta/issues/493
• https://www.postgresql.org/docs/current/datatype-oid.html
• https://docs.sqlalchemy.org/en/20/dialects/postgresql.html#sqlalchemy.dialects.postgresql.OID

[sirex]

Also add support for following types:

• MSSQL SMALLMONEY
• MSSQL UNIQUEIDENTIFIER