Add ParametricTypeName to support names of types like arrays and tuples. (#940)

Adds to `_schemapath`
- `ParametricTypeName` which represents a type with parameters such as `array<int64>`.
- `TypeName` which is an alias for `SchemaPath | ParametricTypeName`

Then uses these:
- Change query builder expressions to use `TypeName` instead of `SchemaPath` for types.
- Add `type_name` to `GelTypeMetadata.__gel_reflection__`