Change activity error to warn, or allow it to be configurable

[longquanzheng]

sdk-go/internal/internal_task_handlers.go

Line 2246 in ccb28ef

ath.logger.Error("Activity error.",

In my company, we are default monitors on errors that are expected to be more critical cases. But many errors in activity are retryable that are not too critical for us.

If you want to keep it error, can we make it configuable on SDK that we can change to other level like "Warn"?

Thanks