[vsphere-problem-detector] report privilege missing when using pre-existing folder and/or resource pool with ReadOnly permission

According to https://issues.redhat.com/browse/OCPBUGS-705, thanks Junyun share the test env/result for install part, and we need the fix in vsphere-problem-detector, currently it reports the following missing when using the pre-existing folder and/or resource pool with ReadOnly permission：
  
1. vcenter cluster set ReadOnly permission: 
I0902 10:07:50.324782       1 vsphere_check.go:244] CheckComputeClusterPermissions:jima-permission-q84s8-worker-86gd4 failed: missing privileges for compute cluster workloads: Resource.AssignVMToPool, VApp.AssignResourcePool, VApp.Import, VirtualMachine.Config.AddNewDisk


2. datacenter set ReadOnly permission:
I0902 08:09:19.462001       1 vsphere_check.go:225] CheckAccountPermissions failed: missing privileges for datacenter OCP-DC: Resource.AssignVMToPool, VApp.Import, VirtualMachine.Config.AddExistingDisk, VirtualMachine.Config.AddNewDisk, VirtualMachine.Config.AddRemoveDevice, VirtualMachine.Config.AdvancedConfig, VirtualMachine.Config.Annotation, VirtualMachine.Config.CPUCount, VirtualMachine.Config.DiskExtend, VirtualMachine.Config.DiskLease, VirtualMachine.Config.EditDevice, VirtualMachine.Config.Memory, VirtualMachine.Config.RemoveDisk, VirtualMachine.Config.Rename, VirtualMachine.Config.ResetGuestInfo, VirtualMachine.Config.Resource, VirtualMachine.Config.Settings, VirtualMachine.Config.UpgradeVirtualHardware, VirtualMachine.Interact.GuestControl, VirtualMachine.Interact.PowerOff, VirtualMachine.Interact.PowerOn, VirtualMachine.Interact.Reset, VirtualMachine.Inventory.Create, VirtualMachine.Inventory.CreateFromExisting, VirtualMachine.Inventory.Delete, VirtualMachine.Provisioning.Clone, VirtualMachine.Provisioning.DeployTemplate, VirtualMachine.Provisioning.MarkAsTemplate, Folder.Create, Folder.Delete 

4.12.0-0.nightly-2022-09-02-194931

Always 

See Description of problem

The vsphere-problem-detector operator reports privilege missing when using pre-existing folder and/or resource pool with ReadOnly permission

The vsphere-problem-detector operator should not reports privilege missing in that case.