Remove null creationTimestamp in machineset on build01

[liangxia]

Fix below issue for build01 in ArgoCD,

Failed to compare desired state to live state:
 failed to calculate diff:
  error calculating structured merge diff:
   error building typed value from config resource:
    errors:
     .spec.template.metadata.creationTimestamp: field not declared in schema
     .spec.template.spec.metadata.creationTimestamp: field not declared in schema

[openshift-ci-robot]

[REHEARSALNOTIFIER]
@liangxia: no rehearsable tests are affected by this change

Note: If this PR includes changes to step registry files (ci-operator/step-registry/) and you expected jobs to be found, try rebasing your PR onto the base branch. This helps pj-rehearse accurately detect changes when the base branch has moved forward.

[liangxia]

/cc @openshift/test-platform

[openshift-ci]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: liangxia, Prucek

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

The pull request process is described here

Details

Needs approval from an approver in each of these files:

• clusters/OWNERS [Prucek,liangxia]

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

[openshift-ci]

@liangxia: all tests passed!

Full PR test history. Your PR dashboard.

Details

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. I understand the commands that are listed here.