Make undefined-variable flag type annotation without value assignment

[DanielNoord]

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Type of Changes

	Type
✓	🐛 Bug fix

Description

Closes #5140

[coveralls]

Pull Request Test Coverage Report for Build 1345355352

• 11 of 11 (100.0%) changed or added relevant lines in 1 file are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage increased (+0.005%) to 93.217%

---

Totals
Change from base Build 1341360957:	0.005%
Covered Lines:	13592
Relevant Lines:	14581

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💛 - Coveralls

[Pierre-Sassoulas]

Looks good ! I have a nitpick :)

[cdce8p]

This change causes a crash when testing Home Assistant.

Exception on node <Name.event_ids l.16 at 0x1052e2230> in file '/Users/marc/Develop/pylint/test5.py'
Traceback (most recent call last):
  File "/Users/marc/Develop/pylint/pylint/utils/ast_walker.py", line 75, in walk
    callback(astroid)
  File "/Users/marc/Develop/pylint/pylint/checkers/variables.py", line 1189, in visit_name
    elif self._is_only_type_assignment(node, name, defstmt):
  File "/Users/marc/Develop/pylint/pylint/checkers/variables.py", line 1560, in _is_only_type_assignment
    for ref_node in node.scope().locals[name][1:]:
KeyError: 'event_ids'

To reproduce

# pylint: disable=undefined-variable

def _purge_filtered_states(session) -> None:
    """Remove filtered states and linked events."""
    state_ids: list[int]
    event_ids: list[int | None]
    state_ids, event_ids = zip(
        *(
            session.query(States.state_id, States.event_id)
            .filter(States.entity_id.in_(excluded_entity_ids))
            .limit(MAX_ROWS_TO_PURGE)
            .all()
        )
    )
    event_ids = [id_ for id_ in event_ids if id_ is not None]

--
Taken from here: homeassistant/components/recorder/purge.py -> _purge_filtered_states

[cdce8p]

Tracking the issue in #5162