github actions: rewrite file test action to fix ulimit; add timeouts

.github/workflows/test-transfer.yml

@@ -10,9 +10,13 @@ jobs:
   test-transfer-http:
     runs-on: ubuntu-latest
     name: "Test BitTorrent file transfer over HTTP (with and without TLS), UDP and WSS"
+    timeout-minutes: 20
+    container:
+      image: rust:1-bullseye
+      options: --ulimit memlock=524288:524288
     steps:
       - name: Checkout
         uses: actions/checkout@v2
       - name: Test file transfers
         uses: ./.github/actions/test-transfer
-        id: test_transfer
+        id: test_transfer