+++ This bug was initially created as a clone of Bug #1977369 +++

Description of problem:

If a vSphere node object has been deleted and the Machine's associated instance has entered a bad state, which prevents it from being joined to the cluster again, the Machine cannot be deleted and will be stuck in the deleting phase seemingly forever.

Errors in machine reconciler log:
```
 I0628 22:43:56.945572 1 recorder.go:104] controller-runtime/manager/events "msg"="Warning" "message"="e2e-fhn5z: reconciler failed to Delete machine: e2e-fhn5z: Can't check node status before vm destroy: nodes \"windows-host\" not found" "object"=
```

Logic behind this is here:
https://github.com/openshift/machine-api-operator/blob/e461e729a3077016228f34d0db8845b421a91c6d/pkg/controller/vsphere/reconciler.go#L276-L280

Perhaps checkNodeReachable should return false (with no error) in the case of the node object not existing?
https://github.com/openshift/machine-api-operator/blob/e461e729a3077016228f34d0db8845b421a91c6d/pkg/controller/vsphere/machine_scope.go#L158

Version-Release number of selected component (if applicable):
4.8 RC

How reproducible:
Always

Steps to Reproduce:
1. Delete vSphere node
2. Cause vSphere instance to be un-configurable by the cluster. (In case of Windows Machine Config Operator this was removing the ability to SSH into the instance)
3. Attempt to delete the Machine

Actual results:
The Machine is stuck in the deleting phase.

Expected results:
The Machine is deleted.

Additional info:

==============================================================================
Another Scenario being caused by it 

Cluster version is 4.7.0-0.nightly-2021-06-26-014854

Steps :
1.Create a mhc using below :
Expected & Actual : mhc created successfully

2.Delete the worker node being referenced by machineset being monitored by mhc
Node deleted successfully
[miyadav@miyadav ~]$ oc get nodes
NAME                               STATUS   ROLES    AGE    VERSION
miyadav-30vsp-p4gh2-master-0       Ready    master   3h5m   v1.20.0+87cc9a4
miyadav-30vsp-p4gh2-master-1       Ready    master   3h5m   v1.20.0+87cc9a4
miyadav-30vsp-p4gh2-master-2       Ready    master   3h5m   v1.20.0+87cc9a4
miyadav-30vsp-p4gh2-worker-84gsl   Ready    worker   173m   v1.20.0+87cc9a4
miyadav-30vsp-p4gh2-worker-pvp8p   Ready    worker   24m    v1.20.0+87cc9a4

[miyadav@miyadav ~]$ oc get nodes
oc get machines 
NAME                               STATUS   ROLES    AGE     VERSION
miyadav-30vsp-p4gh2-master-0       Ready    master   3h27m   v1.20.0+87cc9a4
miyadav-30vsp-p4gh2-master-1       Ready    master   3h27m   v1.20.0+87cc9a4
miyadav-30vsp-p4gh2-master-2       Ready    master   3h27m   v1.20.0+87cc9a4
miyadav-30vsp-p4gh2-worker-84gsl   Ready    worker   3h15m   v1.20.0+87cc9a4

3.New machine provisioned and old one deleted

[miyadav@miyadav ~]$ oc get machines 
NAME                               PHASE         TYPE   REGION   ZONE   AGE
miyadav-30vsp-p4gh2-master-0       Running                              3h28m
miyadav-30vsp-p4gh2-master-1       Running                              3h28m
miyadav-30vsp-p4gh2-master-2       Running                              3h28m
miyadav-30vsp-p4gh2-worker-84gsl   Running                              3h22m
miyadav-30vsp-p4gh2-worker-p8g8p   Provisioned                          72s
miyadav-30vsp-p4gh2-worker-pvp8p   Deleting                             48m
.
.
[miyadav@miyadav ~]$ oc get machines
NAME                               PHASE      TYPE   REGION   ZONE   AGE
miyadav-30vsp-p4gh2-master-0       Running                           3h52m
miyadav-30vsp-p4gh2-master-1       Running                           3h52m
miyadav-30vsp-p4gh2-master-2       Running                           3h52m
miyadav-30vsp-p4gh2-worker-84gsl   Running                           3h46m
miyadav-30vsp-p4gh2-worker-p8g8p   Running                           24m
miyadav-30vsp-p4gh2-worker-pvp8p   Deleting                          72m


Expected and actual :
New machine provisioned successfully
Old one stuck in deleting state with below error :
Events:
  Type     Reason          Age                   From                           Message
  ----     ------          ----                  ----                           -------
  Normal   Create          70m                   vspherecontroller              Created Machine miyadav-30vsp-p4gh2-worker-pvp8p
  Warning  FailedCreate    70m                   vspherecontroller              miyadav-30vsp-p4gh2-worker-pvp8p: reconciler failed to Create machine: task task-3107089 has not finished
  Warning  FailedUpdate    70m                   vspherecontroller              miyadav-30vsp-p4gh2-worker-pvp8p: reconciler failed to Update machine: task task-3107089 has not finished
  Normal   Update          30m (x14 over 69m)    vspherecontroller              Updated Machine miyadav-30vsp-p4gh2-worker-pvp8p
  Normal   MachineDeleted  22m                   machinehealthcheck-controller  Machine openshift-machine-api/mhc2/miyadav-30vsp-p4gh2-worker-pvp8p/miyadav-30vsp-p4gh2-worker-pvp8p has been remediated by requesting to delete Machine object
  Warning  FailedDelete    3m19s (x20 over 22m)  vspherecontroller              miyadav-30vsp-p4gh2-worker-pvp8p: reconciler failed to Delete machine: miyadav-30vsp-p4gh2-worker-pvp8p: Can't check node status before vm destroy: nodes "miyadav-30vsp-p4gh2-worker-pvp8p" not found

Additional info : Will attach must-gather