Plugin parameters inspection for Python 3.14

With the release of Python 3.14, many runtime annotations can now be declared without strings. If they are evaluated then `NameError`s will occur.

Inspecting the callable signature of a plugin only requires the parameters' `name`s and `default`, so the annotations can be ignored and the inspection `annotation_format` can be set to `Format.STRING` (so long as `eval_str` is also `False` like it is by default).

See https://docs.python.org/3.14/library/inspect.html#inspect.signature & https://docs.python.org/3.14/library/annotationlib.html#annotationlib.Format.STRING

src/flake8/plugins/finder.py

@@ -1,6 +1,7 @@
 """Functions related to finding and loading plugins."""
 from __future__ import annotations
 
+import annotationlib
 import configparser
 import importlib.metadata
 import inspect
@@ -276,7 +277,9 @@ def _parameters_for(func: Any) -> dict[str, bool]:
 
     parameters = {
         parameter.name: parameter.default is inspect.Parameter.empty
-        for parameter in inspect.signature(func).parameters.values()
+        for parameter in inspect.signature(
+            func, annotation_format=annotationlib.Format.STRING
+        ).parameters.values()
         if parameter.kind is inspect.Parameter.POSITIONAL_OR_KEYWORD
     }