Sync the `d_b_workspace_cluster` table

[andrew-farries]

As part of #9198 we want to start syncing the d_b_workspace_cluster table with db-sync.

Currently, the table differs between US and EU regions because each table contains only the data relevant to that region. For example, in the EU table, the eu70 workspace cluster is marked as available and the us70 cluster is cordoned. In the US cluster eu70 is cordoned and us70 is available.

In order to sync the table we need to get to a point where there is no difference in the data in the table between EU and US regions.

• Add new environment variables to migration jobs so that migration scripts are aware of the application cluster name
  • Add to installer migration job ([installer] Add default environment to the migration job #13673)
  • Add to werft deployments (https://github.com/gitpod-io/ops/pull/5758/)
• Add applicationCluster field to d_b_workspace_cluster table ([db] Add applicationCluster field to d_b_workspace_cluster table #13722)
• Show the application cluster in the output of gpctl clusters list ([gpctl] Show application cluster in gpctl clusters list output #13941)
• Ensure static bridges as created by the installer have applicationCluster set. ([installer] Add applicationCluster to statically configured workspace clusters #13946)
• Make server workspace starter aware of the new applicationCluster field when selecting clusters ([ws-manager] Make cluster selection filter by application cluster #14050).
• Ensure that ws-manager-bridge RPC endpoints respect the application cluster in which the bridge runs. ([ws-manager] Make cluster selection filter by application cluster #14050)
• Change the primary key of the table ([db] Change the primary key of the d_b_workspace_cluster table #14134)
• Make the table use soft deletion.
• Add table to db-sync config ([db-sync] Add the d_b_workspace_cluster table to sync config #14136)
• Add a lastModified column to the table so that it can be synced with db-sync. ([db] Add _lastModified column to d_b_workspace_cluster table #14126)