Description of problem:

Originally importing the cluster : https://issues.redhat.com/browse/ACM-24929

Imported OCP clusters - When removed and added host in the clusterInstance yaml, the latter still shows resources  rendered but the host is removed for the nodes list.

the CRs: bmh, nmstate,infraenv are not removed and the node still shows as part of the cluster

Version-Release number of selected component (if applicable): ACM/siteconfig : 2.15.0

How reproducible: always

Steps to Reproduce:

1.  import a 3 nodes cluster or more to ACM following this doc: https://docs.google.com/document/d/1oKCk69Nnux-adc8sjmGe5tbEk5TZEHOUpZH17cXIvXU/edit?tab=t.0#heading=h.mc0urzjrdwgx
2.  edit the cluster instance yaml and add host to the list of nodes.
3. while edit the clusterInstance yaml ensure that : spec. has this 

   1. spec:
        suppressedManifests:
          - ClusterDeployment 

1.  push clusterinstance yaml to git.
2. once gitOps is sync'ed ; ClusterInstance will render the CRs and deploy the node.
3. Wait till the node completes the installation : takes about 20mn but I gave it half a day to settle down.
4. Now edit the clusterInstance Yaml and comment or remove the node - item related to the added node.

   1.   nodes:
        - bmcAddress: ... 
        - bmcAddress: ..... 

Actual results: node is not added to the cluster and related resources (bmh, infraenv, nmstate ) are not created

Expected results: the node joins the cluster and related resources are created

Additional info: must-gather is here https://drive.google.com/file/d/1bKn0cOR9Nu3k7MAGWaN8OYNGbGH0bvc1/view?usp=drive_link