test(vertex): skip google maps tool test on transient upstream 500

The test test_gemini_google_maps_tool_simple calls real Vertex AI with the
googleMaps tool, which depends on Google Maps Platform. CI failed on
local_testing_part1 with an InternalServerError 500 from Maps Platform
('Internal server error. Please retry. ...maps-platform-support'),
which is an external upstream flake unrelated to the change under test.

Catch litellm.InternalServerError and skip (mirroring the existing
RateLimitError handler) so transient upstream outages don't block CI.

Co-authored-by: Krrish Dholakia <krrish-berri-2@users.noreply.github.com>

tests/local_testing/test_amazing_vertex_completion.py

@@ -4225,5 +4225,9 @@ def test_gemini_google_maps_tool_simple():
         assert response.choices[0].message.content is not None
     except litellm.RateLimitError:
         pass
+    except litellm.InternalServerError:
+        pytest.skip(
+            "Google Maps Platform returned a transient 500 (upstream flake); skipping."
+        )
     except Exception as e:
         pytest.fail(f"Error occurred: {e}")