feat(xapi/VDI_destroy): dont fail if VDI not found

Aligned with xo-server/xapi/deleteVdi.

@xen-orchestra/xapi/src/vdi.js

@@ -1,19 +1,27 @@
 const CancelToken = require('promise-toolbox/CancelToken')
+const pCatch = require('promise-toolbox/catch')
 const pRetry = require('promise-toolbox/retry')
 
 const extractOpaqueRef = require('./_extractOpaqueRef')
 
+const noop = Function.prototype
+
 module.exports = class Vdi {
   async clone(vdiRef) {
     return extractOpaqueRef(await this.callAsync('VDI.clone', vdiRef))
   }
 
   async destroy(vdiRef) {
-    // work around a race condition in XCP-ng/XenServer where the disk is not fully unmounted yet
-    await pRetry(() => this.callAsync('VDI.destroy', vdiRef), {
-      ...this._vdiDestroyRetry,
-      when: { code: 'VDI_IN_USE' },
-    })
+    await pCatch.call(
+      // work around a race condition in XCP-ng/XenServer where the disk is not fully unmounted yet
+      pRetry(() => this.callAsync('VDI.destroy', vdiRef), {
+        ...this._vdiDestroyRetry,
+        when: { code: 'VDI_IN_USE' },
+      }),
+      // if this VDI is not found, consider it destroyed
+      { code: 'HANDLE_INVALID' },
+      noop
+    )
   }
 
   async create(