fix(xo-server/vm.importFromEsxi): userdevice is a string (#7361)

Introduced by 59cc418973

From zammad#82017 and other tickets

CHANGELOG.unreleased.md

@@ -11,6 +11,8 @@
 
 > Users must be able to say: “I had this issue, happy to know it's fixed”
 
+- [Import/VMWare] Fix `(Failure \"Expected string, got 'I(0)'\")` (PR [#7361](https://github.com/vatesfr/xen-orchestra/issues/7361))
+
 ### Packages to release
 
 > When modifying a package, add it here with its release type.
@@ -27,4 +29,6 @@
 
 <!--packages-start-->
 
+- xo-server patch
+
 <!--packages-end-->

packages/xo-server/src/xo-mixins/migrate-vm.mjs

@@ -265,7 +265,7 @@ export default class MigrateVm {
                 VDI: vdi.$ref,
                 VM: vm.$ref,
                 device: `xvd${String.fromCharCode('a'.charCodeAt(0) + userdevice)}`,
-                userdevice: userdevice < 3 ? userdevice : userdevice + 1,
+                userdevice: String(userdevice < 3 ? userdevice : userdevice + 1),
               })
             } else {
               vhd = await openDeltaVmdkasVhd(esxi, datastore, path + '/' + fileName, parentVhd, {
@@ -316,7 +316,7 @@ export default class MigrateVm {
                 VDI: vdi.$ref,
                 VM: vm.$ref,
                 device: `xvd${String.fromCharCode('a'.charCodeAt(0) + userdevice)}`,
-                userdevice: userdevice < 3 ? userdevice : userdevice + 1,
+                userdevice: String(userdevice < 3 ? userdevice : userdevice + 1),
               })
             } else {
               if (parentVhd === undefined) {