CAPV: add 1.7 release jobs and bump kubekins to 1.26

[chrischdi]

This MR adds the jobs for the release-1.7 branch.
As addition it bumps the used kubekins image to the 1.26 one. 1.27 cannot be used yet due to a dependency which is not yet compatible to golang 1.20 (kubekins 1.26 is on golang 1.19)

When comparing to the jobs of release-1.6 the jobs stay the same.

When comparing to the jobs of main, release-1.7 would not get tested for the following:

• Periodics:

  main prowjob name	command
  periodic-cluster-api-provider-vsphere-upgrade-main	GINKGO_FOCUS: [clusterctl-Upgrade]
  periodic-cluster-api-provider-vsphere-coverage	./hack/ci-test-coverage.sh + gopherage

• Pull Requests:

  main prowjob name	command
  pull-cluster-api-provider-vsphere-apidiff-main	./hack/ci-apidiff.sh
  pull-cluster-api-provider-vsphere-verify-markdown	mdlint
  pull-cluster-api-provider-vsphere-verify-shell	shellcheck
  pull-cluster-api-provider-vsphere-verify-crds	hack/verify-crds.sh
  pull-cluster-api-provider-vsphere-verify-gen	make verify-gen

[randomvariable]

/approve

[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: chrischdi, randomvariable

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• config/jobs/kubernetes-sigs/cluster-api-provider-vsphere/OWNERS [randomvariable]

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[chrischdi]

cc @sbueringer

[sbueringer]

/lgtm

[k8s-ci-robot]

@chrischdi: Updated the job-config configmap in namespace default at cluster test-infra-trusted using the following files:

• key cluster-api-provider-vsphere-ci.yaml using file config/jobs/kubernetes-sigs/cluster-api-provider-vsphere/cluster-api-provider-vsphere-ci.yaml
• key cluster-api-provider-vsphere-periodics-release-1.7.yaml using file config/jobs/kubernetes-sigs/cluster-api-provider-vsphere/cluster-api-provider-vsphere-periodics-release-1.7.yaml
• key cluster-api-provider-vsphere-periodics.yaml using file config/jobs/kubernetes-sigs/cluster-api-provider-vsphere/cluster-api-provider-vsphere-periodics.yaml
• key cluster-api-provider-vsphere-presubmits-release-1.7.yaml using file config/jobs/kubernetes-sigs/cluster-api-provider-vsphere/cluster-api-provider-vsphere-presubmits-release-1.7.yaml
• key cluster-api-provider-vsphere-presubmits.yaml using file config/jobs/kubernetes-sigs/cluster-api-provider-vsphere/cluster-api-provider-vsphere-presubmits.yaml

In response to this:

This MR adds the jobs for the release-1.7 branch.
As addition it bumps the used kubekins image to the 1.26 one. 1.27 cannot be used yet due to a dependency which is not yet compatible to golang 1.20 (kubekins 1.26 is on golang 1.19)

When comparing to the jobs of release-1.6 the jobs stay the same.

When comparing to the jobs of main, release-1.7 would not get tested for the following:

• Periodics:

main prowjob name	command
periodic-cluster-api-provider-vsphere-upgrade-main	GINKGO_FOCUS: [clusterctl-Upgrade]
periodic-cluster-api-provider-vsphere-coverage	./hack/ci-test-coverage.sh + gopherage

• Pull Requests:

main prowjob name	command
pull-cluster-api-provider-vsphere-apidiff-main	./hack/ci-apidiff.sh
pull-cluster-api-provider-vsphere-verify-markdown	mdlint
pull-cluster-api-provider-vsphere-verify-shell	shellcheck
pull-cluster-api-provider-vsphere-verify-crds	hack/verify-crds.sh
pull-cluster-api-provider-vsphere-verify-gen	make verify-gen

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