OCPBUGS-32776: Fix IBM Public Cloud DNS Provider Update Logic

The IBM Public Cloud DNS provider (cis_provider.go) had a bug in
`createOrUpdateDNSRecord` where it checked for the existence of a
DNS record by filtering both DNS name and target. If the target
was updated (e.g., due to a load balancer recreation), the logic
would not match the existing DNS record. As a result, the function
would attempt to create a new record, but fail because a record with
that name already existed, as multiple DNS records with the same
name are not allowed.

The fix is to remove the filtering by target and rely solely on
filtering by name, as the name is the only attribute that needs
to be unique.

pkg/dns/ibm/public/cis_provider.go

@@ -161,7 +161,6 @@ func (p *Provider) createOrUpdateDNSRecord(record *iov1.DNSRecord, zone configv1
 	dnsName := strings.TrimSuffix(record.Spec.DNSName, ".")
 	listOpt.SetName(dnsName)
 	for _, target := range record.Spec.Targets {
-		listOpt.SetContent(target)
 		result, response, err := dnsService.ListAllDnsRecords(listOpt)
 		if err != nil {
 			if response != nil && response.StatusCode != http.StatusNotFound {