Signal argument deserialization errors not using workflow-specific logger or giving enough context

[cretz]

Describe the solution you'd like

Unlike other arg deserialization errors in a workflow which fail the task by default, signal deserialization errors are treated special to log-and-ignore to not fail the entire workflow. However, the log is not using the workflow logger at

sdk-python/temporalio/worker/_workflow_instance.py

Lines 2316 to 2318 in 3b0b1f9

	logger.exception(
	f"Failed deserializing signal input for {job.signal_name}, dropping the signal"
	)

meaning there is not enough context to diagnose.