fix return type of trio/_core/_run to not be an awaitable, remove type: ignore

Author: jakkdl

trio/_core/_run.py

@@ -2152,7 +2152,7 @@ def setup_runner(
 
 
 def run(
-    async_fn: Callable[..., RetT],
+    async_fn: Callable[..., Awaitable[RetT]],
     *args: object,
     clock: Clock | None = None,
     instruments: Sequence[Instrument] = (),

trio/testing/_trio_test.py

@@ -40,8 +40,7 @@ def wrapper(*args: ArgsT.args, **kwargs: ArgsT.kwargs) -> RetT:
         else:
             raise ValueError("too many clocks spoil the broth!")
         instruments = [i for i in kwargs.values() if isinstance(i, Instrument)]
-        # trio.run isn't typed yet.
-        return _core.run(  # type: ignore[no-any-return]
+        return _core.run(
             partial(fn, *args, **kwargs), clock=clock, instruments=instruments
         )