parallelMigrationsPerCluster doesn't work in decentralized live migration

CNV-v4.20.0.rhel9-144

Always

1. Create 7 VMs  (more than 5 VMs)
2. Create a Plan to migrate all the 7 VMs
3. Start the Plan and monitor the VM/VMIM status

All the 7 VMs are migrating, even there is parallelMigrationsPerCluster 5 set in HCO and VMIM

HCO

    liveMigrationConfig:
      allowAutoConverge: false
      allowPostCopy: false
      completionTimeoutPerGiB: 150
      network: lm-network
      parallelMigrationsPerCluster: 5
      parallelOutboundMigrationsPerNode: 2
      progressTimeout: 150



VMIM

status:
  migrationState:
    completed: true
    endTimestamp: "2025-09-10T04:09:32Z"
    migrationConfiguration:
      allowAutoConverge: false
      allowPostCopy: false
      allowWorkloadDisruption: false
      bandwidthPerMigration: "0"
      completionTimeoutPerGiB: 150
      network: lm-network
      nodeDrainTaintKey: kubevirt.io/drain
      parallelMigrationsPerCluster: 5
      parallelOutboundMigrationsPerNode: 2
      progressTimeout: 150

If we have parallelMigrationsPerCluster 5 set in HCO, then max migrations in parallel should be 5 VMs.