loki URL should be externalized

[nagkumar]

   LogRecordProcessor otelLogRecordProcessor()
    {
	return BatchLogRecordProcessor
		.builder(OtlpGrpcLogRecordExporter.builder()
						  .setEndpoint("http://localhost:4317")
						  .build())
		.build();
    }
}

in this code "http://localhost:4317" should be read from spring configuration file..so that message is clear and changeable any time