deps: update module github.com/keptn/lifecycle-toolkit/keptn-cert-manager to v0.8.0 #15092

Job	Run time
Prepare CI Run	6s
Build Docker Image (lifecycle-operator, lifecycle-operator/)	2m 12s
Store tag of the built images	2s
Unit Tests (lifecycle-operator, lifecycle-operator/)	2m 26s
Build Docker Image (metrics-operator, metrics-operator/)	3m 33s
Build Docker Image (scheduler, scheduler/)	2m 46s
Unit Tests (metrics-operator, metrics-operator/)	3m 46s
Build Docker Image (deno-runtime, runtimes/deno-runtime/)	24s
Unit Tests (scheduler, scheduler/)	28s
Build Docker Image (python-runtime, runtimes/python-runtime/)	1m 20s
Unit Tests (certificate-operator, keptn-cert-manager/)	1m 17s
Build Docker Image (certificate-operator, keptn-cert-manager/)	2m 5s
Component Tests / Component Tests	3m 25s
Publish helm chart changes to charts repo	0s
Load Tests / Run load Tests	7m 1s
End to End Tests / Run E2E Tests (lifecycle-operator, lifecycle-operator/)	2m 45s
End to End Tests / Run E2E Tests (scheduler, scheduler/)	3m 10s
Integration Tests (gates_off, allowed_ns_off) / Run Chainsaw Tests	16m 50s
Integration Tests (gates_off, allowed_ns_on) / Run Chainsaw Tests	3m 27s
Integration Tests (gates_on, allowed_ns_off) / Run Chainsaw Tests	19m 48s
Integration Tests (gates_on, allowed_ns_on) / Run Chainsaw Tests	3m 29s
	1h 20m 20s

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