fix: mac dir delete

[phawxby]

Description

Fixes an issue on Mac where using Unlink on a directory results in an EPERM error, which prevents following on to the Remove which does work ok.

Test Coverage

• This change is covered by existing or additional automated tests.
• Manual testing has been performed (and evidence provided) as automated testing was not feasible.
• Additional tests are not required for this change (e.g. documentation update).

File delete

name = "node_modules/stale.txt"
err = nil
unlinkErr = nil
removeErr = nil

Dir delete

name = "node_modules"
err = nil
unlinkErr = error(*fmt.wrapError) *{msg: "conflict: operation not permitted", err: error(*errors.errorString) *{s: "conflict"}}
removeErr = nil