[Cherry-Pick] increase cert-manager wait time for kubeflow-issuer to …

…be install (#632)

Cherry pick this commit from main to temporarily solve:
```
: Internal error occurred: failed calling webhook "webhook.cert-manager.io": failed to call webhook: Post "[https://cert-manager-webhook.cert-manager.svc:443/mutate?timeout=10s](https://cert-manager-webhook.cert-manager.svc/mutate?timeout=10s)": context deadline exceeded
```

tests/e2e/utils/kubeflow_installation.py

@@ -132,12 +132,12 @@ def install_component(
  else:
  apply_kustomize(kustomize_path)
  # TO DO: Debug and add additional validation step for cert-manager resources in future for kubeflow-issuer to be installed
- # temporary solution to wait for 30s
+ # temporary solution to wait for 60s
  if component_name == "cert-manager":
  print(
- "wait for 30s for cert-manager-webhook resource to be ready..."
+ "wait for 60s for cert-manager-webhook resource to be ready..."
  )
- time.sleep(30)
+ time.sleep(60)
 
  if "validations" in installation_config[component_name]:
  validate_component_installation(installation_config, component_name)