Add robustness to part download failures due to 403 errors

[apockill]

It seems like some parts just consistently fail to download due to access rights errors. I think this leads to a loop where andrew or gabby have to

1. run exporter
2. see a 403 failure on part X
3. go on onshape and "suppress" part X
4. go back to step 1

So this helps remove that loop, and speeds up the process! Root cause for 403 errors is unknown though :/

[velovix]

Is this an error that Gabby and Andrew are seeing or is it something software folks are seeing? I've gotten 403 errors in the past because I was shared on only part of an assembly (or something like that) and Andrew was able to fix it for my by sharing me on more of it. If it's something hardware folks are seeing, that's a mysterious issue to me and I would be down with merging this.

[apockill]

Is this an error that Gabby and Andrew are seeing or is it something software folks are seeing? I've gotten 403 errors in the past because I was shared on only part of an assembly (or something like that) and Andrew was able to fix it for my by sharing me on more of it. If it's something hardware folks are seeing, that's a mysterious issue to me and I would be down with merging this.

That's good to know! In this case, this was something gabby was seeing, and only on certain parts of the export.