Update snapd to 2.37.2

Summary:
Update snapd to 2.37.2

Changelog:

• cmd/snap, overlord/snapstate: ignore classic flag when a
• snap is strictly confined and warn only instead of erroring
• snap-confine: remove special handling of /var/lib/jenkins
• cmd/snap-confine: handle death of helper process gracefully
• snap-confine: fix classic snaps for users with /var/lib/* homedirs like jenkins/postgres
• packaging: disable systemd environment generator on 18.04
• tests: update smoke/sandbox test for armhf
• cmd/snap-confine: refactor and cleanup of seccomp loading
• snap-confine: increase locking timeout to 30s
• snap-confine: fix incorrect "sanity timeout 3s" message
• snap: fix hook autodiscovery for parallel installed snaps
• tests: iterate getting journal logs to support delay on boards on daemon-notify test
• interfaces: add u2f-devices interface

Test Plan: Startet spotify, played a round of ohmygiraffe and solitary

Reviewers: Triage Team, JoshStrobl

Reviewed By: Triage Team, JoshStrobl

Differential Revision: https://dev.getsol.us/D5317