fast-glob should always be fed absolute paths

[ds300]

It turns out that globbing (or maybe, rather, micromatch) behaves in odd ways when you mix absolute and relative paths while passing both implicit and explicit cwd. We should make sure we're always giving fast-glob absolute paths, just to be safe. Then the cwd arg becomes moot so it can be elided.

Look into adding a wrapper around glob.sync to assert that all include and ignore patterns are absolute. Audit all existing usages of fast-glob.