style(tests): wrap over-long assert line to satisfy pyink

The Pre-commit Linter (pyink 25.12.0, line-length 80) flagged the
`assert any(...)` line in test_skip_summarization_non_agent_tool_appends_no_text_part
as exceeding the line limit. Wrap the generator expression onto its own
line. No behavior change.

Author: lwangverizon

tests/unittests/flows/llm_flows/test_functions_simple.py

@@ -1660,7 +1660,9 @@ def render_widget(tool_context: ToolContext) -> dict:
   assert result_event is not None
   assert result_event.actions.skip_summarization is True
   # The ack is carried only as a function_response part — never as text.
-  assert any(p.function_response is not None for p in result_event.content.parts)
+  assert any(
+      p.function_response is not None for p in result_event.content.parts
+  )
   assert all(p.text is None for p in result_event.content.parts)