Rename CLI executable to zap-cli and point apack.json to it (#757)

* Use CLI from slc.

* Increase feature level.

* use zap-cli naming for the CLI executable

* Update apack.json with the zap-cli name.

* pack zap-cli into ZAP artifacts

* fix path issue when packing cli binary for mac/linux

* Remove an overly paranoid check, which happens to prevent pkg-bundled executable to access metafiles.

Co-authored-by: jiteng <jing.teng@silabs.com>