fix: catch TimeoutError in place of asyncio.TimeoutError (#2131)

# What does this PR do?

As per docs [1], since python 3.11 wait_for() raises TimeoutError. Since
we currently support python 3.10+, we have to catch both.

[1]:
https://docs.python.org/3.12/library/asyncio-task.html#asyncio.wait_for

[//]: # (If resolving an issue, uncomment and update the line below)
[//]: # (Closes #[issue-number])

## Test Plan

No explicit testing; just code hardening to reflect docs.

[//]: # (## Documentation)

Signed-off-by: Ihar Hrachyshka <ihar.hrachyshka@gmail.com>

llama_stack/distribution/routers/routers.py

@@ -630,7 +630,7 @@ class InferenceRouter(Inference):
                     continue
                 health = await asyncio.wait_for(impl.health(), timeout=timeout)
                 health_statuses[provider_id] = health
-            except asyncio.TimeoutError:
+            except (asyncio.TimeoutError, TimeoutError):
                 health_statuses[provider_id] = HealthResponse(
                     status=HealthStatus.ERROR,
                     message=f"Health check timed out after {timeout} seconds",