Right and left sidesets are swapped in TransfiniteMeshGenerator output

[GiudGiud]

Bug Description

Peter was trying to model a loop and stitch each component He could not get the transfinite generator to stitch until the sidesets were flipped back to what's expected

he found other (unrelated) problems with the stitcher, we ll have to narrow down the problems there too. I have a feeling the stitcher should prepare the meshes to make sure the ids/names maps are right after clearing

Steps to Reproduce

Look at the gold files in the transfinite mesh generator folder

Impact

Loss of time Wrong results