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
```