o/snapstate: use StartBeforeDriversLoad only for systems with modes #387

Job	Run time
cache-build-deps	1m 15s
snap-builds	0s
static-checks (1.18)	3m 39s
static-checks (latest/stable)	4m 28s
branch-static-checks	0s
unit-tests (1.18, normal)	5m 6s
unit-tests (1.18, snapd_debug)	5m 3s
unit-tests (1.18, withbootassetstesting)	5m 0s
unit-tests (1.18, nosecboot)	5m 18s
unit-tests (1.18, faultinject)	4m 58s
unit-tests (latest/stable, normal)	5m 14s
unit-tests (latest/stable, snapd_debug)	5m 33s
unit-tests (latest/stable, withbootassetstesting)	5m 17s
unit-tests (latest/stable, nosecboot)	5m 6s
unit-tests (latest/stable, faultinject)	5m 14s
code-coverage	4s
spread-nested	0s
${{ matrix.group }}	0s
	1h 1m 15s

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