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

build-miniooni.sh

@@ -2,10 +2,12 @@
 set -e
 case $1 in
   macos|darwin)
+    go run ./internal/cmd/getresources
     export GOOS=darwin GOARCH=amd64
     go build -o ./CLI/darwin/amd64 -ldflags="-s -w" ./internal/cmd/miniooni
     echo "Binary ready at ./CLI/darwin/amd64/miniooni";;
   linux)
+    go run ./internal/cmd/getresources
     export GOOS=linux GOARCH=386
     go build -o ./CLI/linux/386 -tags netgo -ldflags='-s -w -extldflags "-static"' ./internal/cmd/miniooni
     echo "Binary ready at ./CLI/linux/386/miniooni"
@@ -19,6 +21,7 @@ case $1 in
     go build -o ./CLI/linux/arm64 -tags netgo -ldflags='-s -w -extldflags "-static"' ./internal/cmd/miniooni
     echo "Binary ready at ./CLI/linux/arm64/miniooni";;
   windows)
+    go run ./internal/cmd/getresources
     export GOOS=windows GOARCH=386
     go build -o ./CLI/windows/386 -ldflags="-s -w" ./internal/cmd/miniooni
     echo "Binary ready at ./CLI/windows/386/miniooni.exe"