Staging is blocked when cluster link is enabled

• Type: Bug
• Status: Closed
• Resolution: Fixed
• Affects Version/s: 7.2.X, 7.3.X, 7.4.X, Master
• Fix Version/s: 7.2.10 DXP FP12, 7.2.X, 7.3.7 CE GA8, 7.3.10 DXP FP2, 7.3.X, 7.4.0 CE GA1, 7.4.13 DXP GA1, Master
• Component/s: Staging
• Labels:
  • ee-ts
  • liferay-fixpack-dxp-12-7210
  • liferay-fixpack-dxp-2-7310
• Branch Version/s:
  7.3.x, 7.2.x
• Backported to Branch:
  Committed
• Story Points: 8
• Fix Priority: 3
• Sprint: StagingIter10 - Gondos Bocsok
• Git Pull Request: https://github.com/brianchandotcom/liferay-portal/pull/100168

In normal circumstances background tasks are cleared when the portal starts up.
However, when cluster.link.enabled=true is configured, the cleaning is skipped, resulting in every new staging publication stuck in the QUEUED status.

Reproduction steps:

1. Import PTR2283Dump20210317.sql.
2. Add cluster.link.enabled=true to portal-ext.properties
3. Start the portal
4. Go to testSite and create a new publish process

Result:
Publication is stuck in QUEUED status

Expected:
Publication is successful.