Description of problem:
virsh can't dump empty SATA cdrom device from VMaware guest

Version-Release number of selected component (if applicable):
libvirt-libs-9.9.0-1.el9.x86_64

How reproducible:
100%

Steps to Reproduce:
1.Prepare a guest which has empty cdrom and cdrom device type is SATA
#cat Auto-esx8.0-rhell9.3-efi-with-empty-cdrom/Aut
o-esx8.0-rhell9.3-efi-with-empty-cdrom.vmx |grep 'sata0:0'
sata0:0.startConnected = "FALSE"
sata0:0.deviceType = "cdrom-image"
sata0:0.fileName = ""
sata0:0.present = "TRUE"

2.Use virsh to dump the guest libvirtxml from VMware

1. virsh -c vpx://root@10.73.212.129/data/10.73.212.36/?no_verify=1 dumpxml Auto-esx8.0-rhell9.3-efi-with-empty-cdrom
   Enter root's password for 10.73.212.129: 
   error: internal error: Invalid or not yet handled value '' for VMX entry 'sata0:0.fileName' for device type 'cdrom-image'

Actual results:
As above description

Expected result:
virsh can dump empty SATA cdrom device from VMaware guest successfully

Additional info:
virsh can dump the empty IDE cdrom device from VMaware guest

1. virsh -c vpx://administrator%40vsphere.local@10.73.213.182/data/10.73.212.38/?no_verify=1  dumpxml Auto-esx7.0-rhel7.7-host_cd-without-filename
   Enter administrator@vsphere.local's password for 10.73.213.182: 
   <domain type='vmware' xmlns:vmware='http://libvirt.org/schemas/domain/vmware/1.0'>
     <name>Auto-esx7.0-rhel7.7-host_cd-without-filename</name>
     <uuid>422cb02d-0d93-9c93-4e96-38735d01d888</uuid>
     <memory unit='KiB'>2097152</memory>
     <currentMemory unit='KiB'>2097152</currentMemory>
     <vcpu placement='static'>1</vcpu>
     <cputune>
       <shares>1000</shares>
     </cputune>
     <os>
       <type arch='x86_64'>hvm</type>
     </os>
     <clock offset='utc'/>
     <on_poweroff>destroy</on_poweroff>
     <on_reboot>restart</on_reboot>
     <on_crash>destroy</on_crash>
     <devices>
       <disk type='file' device='disk'>
         <source file='[esx6.7-6.5-function] esx6.7/Auto-esx6.7-rhel7.7-host_cd-without-filename/Auto-esx6.7-rhel7.7-host_cd-without-filename.vmdk'/>
         <target dev='sda' bus='scsi'/>
         <address type='drive' controller='0' bus='0' target='0' unit='0'/>
       </disk>
       <disk type='block' device='cdrom'>
         <source startupPolicy='optional'/>
         <target dev='hda' bus='ide'/>
         <readonly/>
         <address type='drive' controller='0' bus='0' target='0' unit='0'/>
       </disk>
       <controller type='scsi' index='0' model='vmpvscsi'/>
       <controller type='ide' index='0'/>
       <interface type='bridge'>
         <mac address='00:50:56:ac:56:28' type='generated'/>
         <source bridge='VM Network'/>
         <model type='vmxnet3'/>
       </interface>
       <video>
         <model type='vmvga' vram='8192' primary='yes'/>
       </video>
     </devices>
     <vmware:datacenterpath>data</vmware:datacenterpath>
     <vmware:moref>vm-127</vmware:moref>
   </domain>