opkg_remove: avoid remove pkg repeatly with option --force-removal-of-dependent-packages

While remove pkg with '--force-removal-of-dependent-packages',
pkg may be added to pkgs remove list multiple times, add status
check to make sure pkg only be removed once.

Signed-off-by: Hongxu Jia <hongxu.jia@windriver.com>
Signed-off-by: Paul Barker <paul@paulbarker.me.uk>
(Cherry picked from https://git.yoctoproject.org/cgit/cgit.cgi/opkg/commit/?id=e8996180833aa35d101fbeadec3d787ce0bbda5c)
(Fixes https://dev.archive.openwrt.org/ticket/18320 and openwrt/packages CI)