RTD will start requiring configuration files on September 25, 2023.
This also makes sure that we properly unshallow the clone as that is a
feature flag that is going away as well.
Issue: RELENG-4816
Change-Id: Ia3015cd6f519158ac03ddcb3453d3ac4fb233d51 Signed-off-by: Andrew Grimberg <agrimberg@linuxfoundation.org>