package_manager/sdk: Use filtered copies of the deploy ipk/deb directories

package_manager/sdk: Use filtered copies of the deploy ipk/deb directories

Similar to rpm, use copies of the ipk/deb directories for rootfs construction.
This means the image creation code can no longer "see" recipes wich aren't in its
dependency chain which is good for a variety of reasons including determinism,
incompatible recipe (e.g. systemd/sysvinit) package conflicts and locking
performance.

Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>