JobSet add periodic testing for release-0.8 and drop testing for release-0.6

[kannon92]

No description provided.

[kannon92]

/assign @ahg-g @danielvegamyhre

[danielvegamyhre]

/lgtm
/approve

[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: danielvegamyhre, kannon92

The full list of commands accepted by this bot can be found here.

The pull request process is described here

Needs approval from an approver in each of these files:

• config/jobs/kubernetes-sigs/jobset/OWNERS [danielvegamyhre,kannon92]

Approvers can indicate their approval by writing /approve in a comment
Approvers can cancel approval by writing /approve cancel in a comment

[k8s-ci-robot]

@kannon92: Updated the job-config configmap in namespace default at cluster test-infra-trusted using the following files:

• key jobset-periodics-release-0-6.yaml using file ``
• key jobset-periodics-release-0-8.yaml using file config/jobs/kubernetes-sigs/jobset/jobset-periodics-release-0-8.yaml

In response to this:

Instructions for interacting with me using PR comments are available here. If you have questions or suggestions related to my behavior, please file an issue against the kubernetes-sigs/prow repository.