Fix or remove continuously failing jobs listed under sig-testing testgrid dashboard group

We have a number of jobs that are continuously failing. I'd like to see us get our dashboards back to green.

```bash
suffixes=(
boskos
canaries
e2e-framework
images
kind
kubetest2
maintenance
misc
prow
)
for suffix in "${suffixes[@]}"; do
curl -s https://testgrid.k8s.io/sig-testing-$suffix/summary \
| jq -r '
to_entries
| map(
select(.value.overall_status == "FAILING")
| "- [ ] https://testgrid.k8s.io/\(.value.dashboard_name)#\(.key)"
)[]';
done
```

- [x] https://testgrid.k8s.io/sig-testing-canaries#bazelbuild-canary
- [ ] https://testgrid.k8s.io/sig-testing-canaries#benchmark-demo
- [ ] https://testgrid.k8s.io/sig-testing-canaries#ci-kubernetes-coverage-conformance
- [ ] https://testgrid.k8s.io/sig-testing-canaries#ci-kubernetes-coverage-e2e-gci-gce
- [ ] https://testgrid.k8s.io/sig-testing-canaries#ci-kubernetes-coverage-unit
- [ ] https://testgrid.k8s.io/sig-testing-canaries#ci-kubernetes-generate-make-test-cache
- [ ] https://testgrid.k8s.io/sig-testing-canaries#ci-kubernetes-generate-make-test-count10
- [ ] https://testgrid.k8s.io/sig-testing-canaries#gcb-docker-gcloud-canary
- [ ] https://testgrid.k8s.io/sig-testing-canaries#node
- [x] https://testgrid.k8s.io/sig-testing-images#bigquery: https://github.com/kubernetes/test-infra/pull/23849
- [x] https://testgrid.k8s.io/sig-testing-images#gcloud-in-go: https://github.com/kubernetes/test-infra/pull/23849
- [x] https://testgrid.k8s.io/sig-testing-images#krte: https://github.com/kubernetes/test-infra/pull/23849
- [ ] https://testgrid.k8s.io/sig-testing-images#kubemci
- [ ] https://testgrid.k8s.io/sig-testing-maintenance#autoupdate-patch
- [x] https://testgrid.k8s.io/sig-testing-maintenance#ci-janitor: https://github.com/kubernetes/test-infra/pull/23848
- [x] https://testgrid.k8s.io/sig-testing-maintenance#pull-janitor: https://github.com/kubernetes/test-infra/pull/23848
- [x] https://testgrid.k8s.io/sig-testing-maintenance#triage-update: https://github.com/kubernetes/test-infra/pull/23850

/sig testing
/kind failing-test
/kind bug
/priority important-longterm
/milestone v1.23