tests: run static analysis for prs in self-hosted runners (#13855) #3

Job	Run time
snap-builds	0s
cache-build-deps	1m 24s
static-checks (1.18)	3m 29s
static-checks (latest/stable)	4m 17s
branch-static-checks	0s
unit-tests (1.18, normal)	5m 36s
unit-tests-cross-distro (fedora:39)	7m 27s
unit-tests (latest/stable, normal)	6m 16s
unit-tests-cross-distro (opensuse/tumbleweed)	5m 52s
unit-tests-special (1.18, snapd_debug)	6m 25s
unit-tests-special (1.18, withbootassetstesting)	5m 38s
unit-tests-special (1.18, nosecboot)	6m 34s
unit-tests-special (1.18, faultinject)	5m 30s
unit-tests-special (1.18, race)	9m 26s
unit-tests-special (latest/stable, snapd_debug)	6m 6s
unit-tests-special (latest/stable, withbootassetstesting)	6m 3s
unit-tests-special (latest/stable, nosecboot)	6m 19s
unit-tests-special (latest/stable, faultinject)	5m 54s
unit-tests-special (latest/stable, race)	10m 13s
spread-nested	0s
${{ matrix.group }}	0s
code-coverage	5s
	1h 42m 34s

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