All `plugins` tests that require an `ExperimentalDaemon` are migrated to `integration/plugin/*` and start an experimental daemon to test on it. The end goal being to remove the `experimental` build. Signed-off-by: Vincent Demeester <vincent@sbr.pm> Upstream-commit: 69bab3832ce1d72dd1d3ed2f2b53143ec9ff102c Component: engine