More slow test fixes (#3515)

We still seem to be suffering test timeouts. Hopefully this will fix the integ tests, where #3509 etc fix the unit tests.

Author: richvdh

spec/integ/crypto/verification.spec.ts

@@ -69,6 +69,12 @@ beforeAll(async () => {
     await global.Olm.init();
 });
 
+// load the rust library. This can take a few seconds on a slow GH worker.
+beforeAll(async () => {
+    const RustSdkCryptoJs = await require("@matrix-org/matrix-sdk-crypto-js");
+    await RustSdkCryptoJs.initAsync();
+}, 10000);
+
 afterEach(() => {
     // reset fake-indexeddb after each test, to make sure we don't leak connections
     // cf https://github.com/dumbmatter/fakeIndexedDB#wipingresetting-the-indexeddb-for-a-fresh-state