server: do not check affinity groups if no vm group mappings (apache#…

…9542)

this fixes the exception in smoke test test_affinity_groups

```
2024-08-19T08:34:15,132 ERROR [c.c.a.ApiAsyncJobDispatcher] (API-Job-Executor-87:[ctx-f7804a8e, job-9232]) (logid:b71ddec8) Unexpected exception while executing org.apache.cloudstack.api.command.admin.vm.DeployVMCmdByAdmin com.cloud.utils.exception.CloudRuntimeException: Unable to find on DB, due to: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near ')  FOR UPDATE' at line 1
    at com.cloud.utils.db.GenericDaoBase.searchIncludingRemoved(GenericDaoBase.java:441)
    at com.cloud.utils.db.GenericDaoBase.searchIncludingRemoved(GenericDaoBase.java:368)
    at com.cloud.utils.db.GenericDaoBase.search(GenericDaoBase.java:357)
    at com.cloud.utils.db.GenericDaoBase.lockRows(GenericDaoBase.java:343)
    at org.apache.cloudstack.affinity.dao.AffinityGroupDaoImpl.listByIds(AffinityGroupDaoImpl.java:171)
```

plugins/affinity-group-processors/host-anti-affinity/src/main/java/org/apache/cloudstack/affinity/HostAntiAffinityProcessor.java

@@ -139,6 +139,9 @@ public boolean check(VirtualMachineProfile vmProfile, DeployDestination plannedD
         VirtualMachine vm = vmProfile.getVirtualMachine();
 
         List<AffinityGroupVMMapVO> vmGroupMappings = _affinityGroupVMMapDao.findByVmIdType(vm.getId(), getType());
+        if (CollectionUtils.isEmpty(vmGroupMappings)) {
+            return true;
+        }
 
         for (AffinityGroupVMMapVO vmGroupMapping : vmGroupMappings) {
             // if more than 1 VM's are present in the group then check for