New snapd release 2.53.4
See https://forum.snapcraft.io/t/the-snapd-roadmap/1973 for high-level overview.
- devicestate: mock devicestate.MockTimeutilIsNTPSynchronized to avoid host env leaking into tests
- timeutil: return NoTimedate1Error if it can't connect to the system bus
And thus ends the terrible reign of snapd 2.53.3 which failed to build in launchpad giving birth to snapd 2.53.4