Remove arcwrapper and associated logic.

[albu-diku]

Based on a response to a small cleanup attempt in acwrapper (#350 (comment)) it seems it is better to remove this code and its callsites. Do so here.

[albu-diku]

@jonasbardino I've attempted to carefully perform the removal here, incluing any blocks that conditionally ventured into ARC related things.

The only area I'm not clear on how to handle is mig/shared/mrsltoxsl.py where there are lots of references to arclib that I'm pretty sure would no longer be relevan, but I'm not completel certain what's safe to cut.

[jonasbardino]

@jonasbardino I've attempted to carefully perform the removal here, incluing any blocks that conditionally ventured into ARC related things.

The only area I'm not clear on how to handle is mig/shared/mrsltoxsl.py where there are lots of references to arclib that I'm pretty sure would no longer be relevan, but I'm not completel certain what's safe to cut.

Thanks, the mig/shared/mrsltoxsl.py is arc-specific and should just be purged as well.

[jonasbardino]

The linting errors here are old and fixing them is covered in PR #338 and #363