Reduce log level for receiving an Error payload.

This may not ultimately be an error for the consumer, so logging it as an Error is unnecessary. Reduce the log level to Debug since this would primarily be needed to troubleshoot the behaviour of this library.

Author: bgrainger

src/MySqlConnector/Core/ServerSession.cs

@@ -1340,9 +1340,9 @@ private byte[] CreateConnectionAttributes(string programName)
 		private Exception CreateExceptionForErrorPayload(ReadOnlySpan<byte> span)
 		{
 			var errorPayload = ErrorPayload.Create(span);
-			var exception = errorPayload.ToException();
-			Log.Error(exception, "Session{0} got error payload: Code={1}, State={2}, Message={3}", m_logArguments[0], errorPayload.ErrorCode, errorPayload.State, errorPayload.Message);
-			return exception;
+			if (Log.IsDebugEnabled())
+				Log.Debug("Session{0} got error payload: Code={1}, State={2}, Message={3}", m_logArguments[0], errorPayload.ErrorCode, errorPayload.State, errorPayload.Message);
+			return errorPayload.ToException();
 		}
 
 		private void ClearPreparedStatements()