refactor: enable QA tests and jafar self test (#208)

* refactor: enable QA tests and jafar self test

Part of https://github.com/ooni/probe/issues/1335

* chore: make sure all workflows run on release branches

internal/engine/.github/workflows/qawhatsapp.yml

@@ -1,13 +0,0 @@
-name: "qawhatsapp"
-on:
-  schedule:
-    - cron: "25 3 * * */1"
-jobs:
-  test:
-    runs-on: ubuntu-latest
-    steps:
-      - uses: actions/setup-go@v1
-        with:
-          go-version: "1.14"
-      - uses: actions/checkout@v2
-      - run: ./QA/rundocker.bash "whatsapp"