feat: Add check to _rev attribute when persisting virtual documents

In previous commit we added a check to `meta.rev` attribute in order to
discriminate documents that exist in remote CouchDB from the ones that
don't

This approach would work only for documents handled by the cozy-stack
using JSON-API

But some CouchDB documents are served directly through the `data` route
and are not wrapped into JSON-API

When this is the case, they have a `_rev` attribute instead of a
`meta.rev` one

So we want to check for both forms before persisting virtual documents

packages/cozy-client/src/CozyClient.js

@@ -1142,15 +1142,15 @@ client.query(Q('io.cozy.bills'))`)
    *
    * @private
    * @param {CozyClientDocument} document - Document to be saved
-   * @param {boolean} enforce - When true, save the document even if `meta.rev` exists
+   * @param {boolean} enforce - When true, save the document even if `meta.rev` or `_rev` exist
    * @returns {Promise<void>}
    */
   async persistVirtualDocument(document, enforce) {
-    if (
-      ((document && !document.meta?.rev) || enforce) &&
-      !document.cozyLocalOnly &&
-      !document.cozyFromPouch
-    ) {
+    if (!document || document.cozyLocalOnly || document.cozyFromPouch) {
+      return
+    }
+
+    if ((!document.meta?.rev && !document._rev) || enforce) {
       await this.chain.persistData(document)
     }
   }

packages/cozy-client/src/CozyClient.spec.js

@@ -1393,7 +1393,7 @@ describe('CozyClient', () => {
       expect(client.requestQuery).toHaveBeenCalledTimes(1)
     })
 
-    it('should persist virtual document when no meta.rev', async () => {
+    it('should persist virtual document when no meta.rev nor _rev', async () => {
       jest.spyOn(client, 'requestQuery')
       requestHandler.mockResolvedValue({
         data: {
@@ -1411,7 +1411,37 @@ describe('CozyClient', () => {
       )
     })
 
-    it('should persist array of virtual documents when no meta.rev', async () => {
+    it('should not persist virtual document when meta.rev', async () => {
+      jest.spyOn(client, 'requestQuery')
+      requestHandler.mockResolvedValue({
+        data: {
+          _id: 'some_id',
+          meta: {
+            rev: 'SOME_REV'
+          }
+        }
+      })
+
+      await client.query(query, { as: 'allTodos' })
+
+      expect(persistHandler).not.toHaveBeenCalled()
+    })
+
+    it('should not persist virtual document when _rev', async () => {
+      jest.spyOn(client, 'requestQuery')
+      requestHandler.mockResolvedValue({
+        data: {
+          _id: 'some_id',
+          _rev: 'SOME_REV'
+        }
+      })
+
+      await client.query(query, { as: 'allTodos' })
+
+      expect(persistHandler).not.toHaveBeenCalled()
+    })
+
+    it('should persist array of virtual documents when no meta.rev nor _rev', async () => {
       jest.spyOn(client, 'requestQuery')
       requestHandler.mockResolvedValue({
         data: [