Fix copyUIDGID parameter inversion in Docker compat API

Docker API's copyUIDGID=true means "preserve UID/GID from archive"
but Podman's internal Chown=true means "chown to container user".
This caused Docker SDK clients to have files incorrectly chowned
to root:root instead of preserving the archive's UID/GID.

Fixes: https://github.com/containers/podman/issues/27332
Fixes: https://issues.redhat.com/browse/RUN-3643

Signed-off-by: Jan Rodák <hony.com@seznam.cz>