Fix rgbd_pcl configuration

[borongyuan]

PointCloudXyzrgbNode now support uint16 depth image, so there's no need to use ConvertMetricNode. However, PointCloudXyzrgbNode reruires rectifiec/undistored images as input. Using wrong data may not be noticed with most OAK devices. But since I'm using OAK-D Pro W, the differences are significant. Using unfixed config: Using correct config: RTAB-Map configs may have the same issue. I'll check and test later.

[Serafadam]

Thanks for that, I'll also change it so that this parameter is enabled by default in next PR (and rgb rectification is enabled by launch arg)