Revert "specify master node selector on migrator pod"

[stbenjam]

Reverts #92 > ; tracked by OCPBUGS-18125

Per OpenShift policy, we are reverting this breaking change to get CI and/or nightly payloads flowing again.

This change has broken hypershift, and it is no longer installing. Hypershift fails on

error is version False True 30m Unable to apply 4.14.0-0.nightly-2023-08-25-105956: the cluster operator kube-storage-version-migrator is not available

It seems the deployment never succeeds:

 - lastTransitionTime: "2023-08-25T11:27:43Z"
    message: 'KubeStorageVersionMigratorProgressing: Waiting for Deployment to deploy
      pods'
    reason: KubeStorageVersionMigrator_Deploying
    status: "True"
    type: Progressing
  - lastTransitionTime: "2023-08-25T11:27:43Z"
    message: 'KubeStorageVersionMigratorAvailable: Waiting for Deployment'
    reason: KubeStorageVersionMigrator_Deploying
    status: "False"

To unrevert this, revert this PR, and layer an additional separate commit on top that addresses the problem. Before merging the unrevert, please check a hypershift job and ensure it succeeds.

CC: @sanchezl, @wangke19

[stbenjam]

/skip
/override ci/prow/e2e-aws
/override ci/prow/e2e-aws-operator
/label approved

[openshift-ci]

@stbenjam: Overrode contexts on behalf of stbenjam: ci/prow/e2e-aws, ci/prow/e2e-aws-operator

In response to this:

/skip
/override ci/prow/e2e-aws
/override ci/prow/e2e-aws-operator
/label approved

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[csrwng]

/lgtm

[openshift-ci]

[APPROVALNOTIFIER] This PR is NOT APPROVED

This pull-request has been approved by: csrwng, stbenjam
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[stbenjam]

/label approved

[stbenjam]

/label jira/valid-bug

[openshift-ci]

@stbenjam: all tests passed!

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