dra api: fix status updates

[pohly]

What type of PR is this?

/kind bug

What this PR does / why we need it:

Changing object meta is not supposed to be possible via status updates. For example, it circumvents RBAC permission checks.

Which issue(s) this PR fixes:

Fixes #123727

Special notes for your reviewer:

Found during review of #123516 because it relied on the buggy behavior.

Does this PR introduce a user-facing change?

DRA: ResourceClaim and PodSchedulingContext status updates no longer allow changing object meta data.

[k8s-ci-robot]

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[alculquicondor]

/lgtm
/label api-review
/assign @liggitt

[k8s-ci-robot]

LGTM label has been added.

Git tree hash: a3ba056ee596f20b1daa513f464fbfd23924196e

[alculquicondor]

should we have a test? I don't know if we are very diligent with existing APIs.

[liggitt]

/lgtm
/approve

change is straightforward

can add a test if you want in response to #123730 (comment)

[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: liggitt, pohly

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[jiahuif]

/sig node

[liggitt]

/sig node

[liggitt]

/milestone v1.30