networkmanager: Drop version 1.22.16

meta-networking now comes with a newer version: 1.32.12. 1.22.16 version
was an upgrade for dunfell but now that we move to newer layers, we can
drop it and use the latest in upstream.

This also drops the whitelist of CVE-2021-20297. This is fine because
the upstream version is not affected (1.32.12).

Signed-off-by: Andrei Gherzan <andrei.gherzan@huawei.com>