Promote Immutable Secrets/ConfigMaps feature to GA

[wojtek-t]

/assign @johnbelamaric - for PRR approval
/assign @msau42 @saad-ali - for SIG storage approval

[k8s-ci-robot]

@wojtek-t: GitHub didn't allow me to assign the following users: approval, -, for, SIG, storage.

Note that only kubernetes members, repo collaborators and people who have commented on this issue/PR can be assigned. Additionally, issues/PRs can only have 10 assignees at the same time.
For more information please see the contributor guide

In response to this:

/assign @johnbelamaric - for PRR approval
/assign @msau42 @saad-ali - for SIG storage approval

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/test-infra repository.

[wojtek-t]

/hold

[To ensure that it won't accidentaly merge without both PRR and SIG-storage approval.]

[johnbelamaric]

/retest

[johnbelamaric]

PRR is approved - I am not using the command because it will approve the whole PR.

[msau42]

/approve

[msau42]

/lgtm

[msau42]

/hold cancel

[saad-ali]

/lgtm
/approve

[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: msau42, saad-ali, wojtek-t

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:

• keps/prod-readiness/OWNERS [wojtek-t]
• keps/sig-storage/OWNERS [msau42,saad-ali]

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