Bumping charts for PRE

What does this MR do?

Bumping charts for pre

• updating the commit hash using: 4a67900135cd46e9a8e4bd60cecfb7d4af3b83bb This to grap metrics for gitlab-shell, the original work happened here: gitlab-org/charts/gitlab!2311 (merged)
• Adding necessary config for toolbox to work properly, even though it's not used.

  toolbox:
    backups:
      objectStorage:
        config:
          # This is a required configuration despite being disabled
          # setting it to fake empty values, otherwise our chart fails
          secret: empty
          key: empty

• The updated chart prevents the native use-case for configuring the selector and instead favors our own method, commit: !1427 (e30d9b46)

Author Check-list

Please read the Contributing document and once you do, complete the following:

• Assign to the correct reviewer per the contributing document
• Apply the correct metadata per the contributing document
• Link to related MRs for applying the changes on other environments
• Link to related Chef changes
• If necessary link to a Criticality 4 Change Request issue

Reviewer Check-list

• Reviewed the diff jobs to confirm changes are as expected
• No changes shown in the diffs not associated with this MR - This may require a rebase or further investigation

Applier Check-list

• Make sure there is no ongoing deployment for the affected envs before merging (see #announcements slack channel)