[flake8-type-checking] Improve flexibility of runtime-evaluated-decorators (#15204)

Co-authored-by: Micha Reiser <micha@reiser.io>

crates/ruff_linter/resources/test/fixtures/flake8_type_checking/module/app.py

@@ -0,0 +1,25 @@
+from __future__ import annotations
+
+from typing import TYPE_CHECKING
+
+import fastapi
+from fastapi import FastAPI as Api
+
+if TYPE_CHECKING:
+    import datetime  # TC004
+    from array import array  # TC004
+
+app = fastapi.FastAPI("First application")
+
+class AppContainer:
+    app = Api("Second application")
+
+app_container = AppContainer()
+
+@app.put("/datetime")
+def set_datetime(value: datetime.datetime):
+    pass
+
+@app_container.app.get("/array")
+def get_array() -> array:
+    pass

crates/ruff_linter/resources/test/fixtures/flake8_type_checking/module/routes.py

@@ -0,0 +1,14 @@
+from __future__ import annotations
+
+import pathlib  # OK
+from datetime import date  # OK
+
+from module.app import app, app_container
+
+@app.get("/path")
+def get_path() -> pathlib.Path:
+    pass
+
+@app_container.app.put("/date")
+def set_date(d: date):
+    pass