Fix playwright tests (#2325)

* Fix cleanupDBs.js: use async iteration for Azure SDK paged results

* update node version

* fix cleanup script to use new Cosmos SDK APIs correctly

* get rid of global crypto

* fix flakiness

* revert DE pipeline to use Node 18

* nit

---------

Co-authored-by: Asier Isayas <aisayas@microsoft.com>

test/sql/scaleAndSettings/containerPolicies/vectorPolicy.spec.ts

@@ -24,6 +24,14 @@ test.describe("Vector Policy under Scale & Settings", () => {
     await vectorPolicyTab.click();
   });
 
+  test.afterEach("Clear vector policies", async () => {
+    const { resource: containerDef } = await context.container.read();
+    if (containerDef.vectorEmbeddingPolicy?.vectorEmbeddings?.length) {
+      containerDef.vectorEmbeddingPolicy.vectorEmbeddings = [];
+      await context.container.replace(containerDef);
+    }
+  });
+
   test.afterAll("Delete Test Database", async () => {
     await context?.dispose();
   });