snapd takes 90 seconds to shutdown

Hello, snapd appeared to take more than 90 seconds to shutdown when I shut down my laptop just now. This appears to be two problems:

- perhaps snapd needs some internal timeouts, or tighter internal timeouts, for whatever operations were giving it trouble

- definitely systemd needs a much shorter timeout for snapd and maybe everything. When people are turning off their machine they don't always have ninety seconds to wait. I expect five and I'd understand ten. Ninety is mean.

Thanks

ProblemType: Bug
DistroRelease: Ubuntu 20.04
Package: snapd 2.58+20.04.1
ProcVersionSignature: Ubuntu 5.4.0-159.176-generic 5.4.241
Uname: Linux 5.4.0-159-generic x86_64
NonfreeKernelModules: zfs zunicode zavl icp zcommon znvpair
ApportVersion: 2.20.11-0ubuntu27.27
Architecture: amd64
CasperMD5CheckResult: skip
Date: Thu Sep 14 17:11:34 2023
SourcePackage: snapd
UpgradeStatus: Upgraded to focal on 2020-01-24 (1328 days ago)