Adding cert-manager test #1718

Job	Run time
Shellcheck (1.21.x)	18s
govet (1.21.x, ubuntu-latest)	2m 45s
lint (1.21.x, ubuntu-latest)	4m 1s
Check for vulnerable dependencies (1.21.x)	40s
gotest (1.21.x, ubuntu-latest)	3m 12s
operator (1.21.x, ubuntu-latest)	7m 6s
test-tenant (1.21.x, ubuntu-latest)	3m 12s
test-cert-manager (1.21.x, ubuntu-latest)	3m 42s
helm (1.21.x, ubuntu-latest)	2m 55s
helm-floor (1.21.x, ubuntu-latest)	3m 9s
test-kes (1.21.x, ubuntu-latest)	4m 25s
test-policy-binding (1.21.x, ubuntu-latest)	10m 11s
test-tenant-upgrade (1.21.x, ubuntu-latest)	4m 42s
	50m 18s

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