The networkd.service isn't masked (disabled) when installing network-manager by preload

There is an issue scenario from core20/core22 with the latest snapd and network-manager. (including x86/arm64)

If users install network-manager by `sudo snap install`, the default networkd related services are disabled correctly.
However, if users preload network-manager by model assertion, the networked related services still work there.

It means the networked and network-manager are working at the same time on a platform and it may bring out some problems.
Not sure if the handling is broken at core-base or snaps. Need core-base/snapd developer help to check it. Tks.