refactor[cartesian]: fix some type errors in frontend

[romanc]

Description

This PR changes the flat out "ignore all mypy errors" on defir_to_gtir and nodes with a more targeted ignore that only filters "call-arg" errors. These are generated by @attribclass classes, which - apparently - aren't understood by mypy.

In a follow-up PR, we can probably replace @attribclass classes with @dataclass classes. Those seem to serve a similar purpose and are natively understood by mypy.

Requirements

• All fixes and/or new features come with corresponding tests.
• Important design decisions have been documented in the appropriate ADR inside the docs/development/ADRs/ folder.
  N/A