kubevirtci,presubmit: Increase time out for check of provision manager (

#3610)

This job fails occasionally hitting the timeout[1] - 5 minutes is very
tight - lets increase it to 15 minutes.

[1] https://prow.ci.kubevirt.io/view/gs/kubevirt-prow/pr-logs/pull/kubevirt_kubevirtci/1255/check-provision-manager/1828733329004826624

Signed-off-by: Brian Carey <bcarey@redhat.com>

github/ci/prow-deploy/files/jobs/kubevirt/kubevirtci/kubevirtci-presubmits.yaml

@@ -350,7 +350,7 @@ presubmits:
     cluster: kubevirt-prow-control-plane
     decorate: true
     decoration_config:
-      timeout: 5m0s
+      timeout: 15m0s
     labels:
       preset-docker-mirror-proxy: "true"
       preset-podman-in-container-enabled: "true"