Automatic merge from submit-queue (batch tested with PRs 41287, 41636, 44881, 44826)
Enable default signer implementation
**What this PR does / why we need it**:
The Kubernetes controller manager provides a default implementation
of a signer. We should enable it by passing the --cluster-signing-cert-file
and --cluster-signing-key-file parameters to the controller manager
with paths to your Certificate Authority’s keypair. Hoping this will
help pass the "Certificates API [It] should support building a client with a CSR"
e2e test when run against k8s started using local-up-cluster.sh
**Which issue this PR fixes** *(optional, in `fixes #<issue number>(, fixes #<issue_number>, ...)` format, will close that issue when PR gets merged)*: fixes #
**Special notes for your reviewer**:
**Release note**:
```release-note
NONE
```
21f30db4c6