deps: update dependency cert-manager/cert-manager to v1.16.2 #18549

Job	Run time
Prepare CI Run	4s
Store tag of the built images	3s
Build Docker Image (lifecycle-operator, lifecycle-operator/)	2m 51s
Build Docker Image (metrics-operator, metrics-operator/)	3m 22s
Unit Tests (lifecycle-operator, lifecycle-operator/)	5m 3s
Build Docker Image (deno-runtime, runtimes/deno-runtime/)	22s
Unit Tests (metrics-operator, metrics-operator/)	50s
Build Docker Image (python-runtime, runtimes/python-runtime/)	42s
Unit Tests (certificate-operator, keptn-cert-manager/)	20s
Build Docker Image (certificate-operator, keptn-cert-manager/)	2m 41s
Component Tests / Component Tests	2m 27s
Publish helm chart changes to charts repo	0s
Integration Tests Allowed Namespaces / Run Chainsaw Tests	3m 2s
Integration Tests Cert Manager / Run Chainsaw Tests	2m 19s
End to End Tests / Run E2E Tests (lifecycle-operator, lifecycle-operator/)	3m 27s
Integration Tests Metrics / Run Chainsaw Tests	3m 6s
Load Tests / Run load Tests	6m 42s
Integration Tests Lifecycle / Run Chainsaw Tests	10m 2s
Integration Tests (cert_manager_io_off) / Run Chainsaw Tests	12m 34s
Integration Tests (cert_manager_io_on) / Run Chainsaw Tests	13m 57s
	1h 13m 54s

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