Some bugfixes:
- tests: turn modules off explicitly in spread go unti test
- o/snapshotstate: create snapshots directory on import
- cmd/snap-bootstrap/triggerwatch: fix returning wrong errors
- interfaces: add allegro-vcu and media-control interfaces
- interfaces: opengl: add Xilinx zocl bits
- many: fix new ineffassign warnings
- interfaces/seccomp/template.go: allow copy_file_range
- interfaces: allow reading the Xauthority file KDE Plasma writes for Wayland sessions
- data/selinux: allow system dbus to watch /var/lib/snapd/dbus-1
- Remove apparmor downgrade feature
- Support tmp and log dirs on Yocto/Poky