chore: Add v0.28.0 bundle to main branch

[AObuchow]

What does this PR do?

Adds the v0.28.0 bundle & digest bundle to the main branch.

Based off of the following two commits:

• Automated commit that added v0.28.0 bundle
• Automated commit that added v0.28.0 bundle digest

  What issues does this PR fix or reference?

  n/a

Is it tested? How?

n/a

PR Checklist

• [ ] E2E tests pass (when PR is ready, comment /test v8-devworkspace-operator-e2e, v8-che-happy-path to trigger)
  • [ ] v8-devworkspace-operator-e2e: DevWorkspace e2e test
  • [ ] v8-che-happy-path: Happy path for verification integration with Che Signed-off-by: Andrew Obuchowicz aobuchow@redhat.comSigned-off-by: Andrew Obuchowicz aobuchow@redhat.com

[AObuchow]

@dkwon17 please take a look and give a review once you have a moment :)

[openshift-ci[bot]]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: AObuchow, dkwon17

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Needs approval from an approver in each of these files: - ~~[OWNERS](https://github.com/devfile/devworkspace-operator/blob/main/OWNERS)~~ [AObuchow,dkwon17] Approvers can indicate their approval by writing `/approve` in a comment Approvers can cancel approval by writing `/approve cancel` in a comment