findutils: use getlimits from findutils

findutils: use getlimits from findutils

Having findutils depending on coreutils-getlimits makes it harder to replace GNU coreutils with uutils-coreutils
using PREFERRED_PROVIDER.
Also, the findutils repository contains a version of getlimits used for the tests, so there is no need to depend
on coreutils's version of getlimits.

Signed-off-by: Etienne Cordonnier <ecordonnier@snap.com>
Signed-off-by: Mathieu Dubois-Briand <mathieu.dubois-briand@bootlin.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>