webadmin: Do not allow hot plug CPU with exclusive pinning

It is not possible to hot plug CPUs when using exclusive
CPU pinning. Instead of failing on the backend, the CPU
is now listed as "Changes that require Virtual Machine restart"
instead of "Changes that can be applied immediately" in the
"Pending Virtual Machine changes" dialog.

Bug-Url: https://bugzilla.redhat.com/2097717
Bug-Url: https://bugzilla.redhat.com/2111088

backend/manager/modules/common/src/main/java/org/ovirt/engine/core/common/utils/VmCommonUtils.java

@@ -20,6 +20,11 @@ public class VmCommonUtils {
      * @return true, if any CPUs are to be hotplugged, false otherwise
      */
     public static boolean isCpusToBeHotpluggedOrUnplugged(VM source, VM destination) {
+        return cpuSocketsChanged(source, destination)
+                && !source.getCpuPinningPolicy().isExclusive();
+    }
+
+    private static boolean cpuSocketsChanged(VM source, VM destination) {
         return source.getCpuPerSocket() == destination.getCpuPerSocket()
                 && source.getNumOfSockets() != destination.getNumOfSockets()
                 && source.getThreadsPerCpu() == destination.getThreadsPerCpu();