feat: use go1.16 and resources embedding (#235)

* feat: use go1.16 embedding for resources

We want to embed everything that can be easily embedded. We should, at a
minimum, replace the downloading of resources and bindata.

Ref: https://github.com/ooni/probe/issues/1367.

* fix: get rid of bindata and use go embed instead

* fix: start unbreaking some automatic tests

* fix: fetch resources as part of the mobile build

* fix: convert more stuff to go1.16

I still expect many breakages, but we'll fix them.

* fix: make the windows CI green

* fix: get resources before running QA

* fix: go1.16 uses modules by default

* hopefully fix all other outstanding issues

* fix(QA/telegram.py): add another DC IP address

* Apply suggestions from code review

.github/workflows/coverage.yml

@@ -9,12 +9,13 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        go: [ "1.14" ]
+        go: [ "1.16" ]
     steps:
       - uses: actions/setup-go@v1
         with:
           go-version: "${{ matrix.go }}"
       - uses: actions/checkout@v2
+      - run: go run ./internal/cmd/getresources
       - run: go test -short -race -tags shaping -coverprofile=probe-cli.cov ./...
       - uses: shogo82148/actions-goveralls@v1
         with: