Avoid mutating config to fix concurrent execution

[PJB3005]

Description

It seems that Kitchen does not provide separate objects in all cases when doing concurrent execution. This means that mutating config[:binds] and config[:volumes] caused inconsistent state in concurrent actions.

We now copy these before mutating to avoid this.

Issues Resolved

I couldn't find any issues and just decided to fix it right away.

Type of Change

Just a fix

Check List

• [ ] New functionality includes tests
• [ ] All tests pass
• [ ] Commit message includes a Conventional Commit Message