[CI] Remove cacerts scratch directory if it already exists
[CI] Remove cacerts scratch directory if it already exists

This shouldn't be a problem in CI, which uses isolated build workers,
but it can be troublesome if you're trying to run this locally for
troubleshooting purposes.

Signed-off-by: Christopher Maier <b4598f17a90ef80817bae8ad6c37249740caafb4@chef.io>

habitat-sh/habitat,habitat-sh/habitat,habitat-sh/habitat,habitat-sh/habitat,habitat-sh/habitat,habitat-sh/habitat,habitat-sh/habitat,habitat-sh/habitat