snap: aware of channel in installed snaps (#6435)
* [WIP] snap: aware of channel in installed snaps
* parse snap list output and assert whether channel matches
* undo test
* fail rightfully when install with different channel does not work
* transparetent refresh
* rollback comment in integration test
* rollback comment in integration test
* add changelog frag
* Update plugins/modules/snap.py
Co-authored-by: Felix Fontein <felix@fontein.de>
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Co-authored-by: Felix Fontein <felix@fontein.de>
(cherry picked from commit b78d1999e1)
Co-authored-by: Alexei Znamensky <103110+russoz@users.noreply.github.com>
