fix(E2E): ensure miniooni.bash is WAI (#972)

This diff re-enables `E2E/miniooni.bash`. To make it working properly, we
needed to figure out which were the right cloudfronts to use.

I looked into the configuration and determined that both cloudfronts
should be used because they basically map to the same host.

I also determined it was backwards to test a mixture of prod and testing
APIs, and probably also flaky. So, I  choose to only test the prod.

Additionally, I added support for testing all supported tunnels.

Closes https://github.com/ooni/probe/issues/2336

E2E/miniooni.bash

@@ -6,21 +6,46 @@
 #
 # Note: using --tunnel=psiphon assumes that we have been compiling
 # miniooni with builtin support for psiphon.
+#
+# Note about cloudfront: as of 2022-10-08, dvp6h0xblpcqp.cloudfront.net
+# and dkyhjv0wpi2dk.cloudfront.net front distinct aliases of the
+# same backend host (backend-fsn.ooni.org). We can use either addr
+# and the result should be the same. So, let us test that.
 
 set -euxo pipefail
 
-backends=()
-backends+=( "https://api.ooni.io" )
-backends+=( "https://dvp6h0xblpcqp.cloudfront.net" )
-backends+=( "https://ams-pg-test.ooni.org" )
+rm -f E2E/o.jsonl
 
 miniooni="${1:-./miniooni}"
-for ps in ${backends[@]}; do
-    opt="-o E2E/o.jsonl --probe-services=$ps"
-    $miniooni --yes $opt -i http://mail.google.com web_connectivity
-done
 
-$miniooni --tunnel=psiphon --yes -i http://mail.google.com web_connectivity
-$miniooni --tunnel=tor --yes -i http://mail.google.com web_connectivity
+$miniooni --yes -o E2E/o.jsonl \
+	--probe-services=https://api.ooni.io/ \
+	--tunnel=none \
+	web_connectivity -i https://mail.google.com/robots.txt
 
-#go run ./internal/cmd/e2epostprocess -expected 5  # TODO(bassosimone): fix this
+$miniooni --yes -o E2E/o.jsonl \
+	--probe-services=https://dvp6h0xblpcqp.cloudfront.net/ \
+	--tunnel=none \
+	web_connectivity -i https://mail.google.com/robots.txt
+
+$miniooni --yes -o E2E/o.jsonl \
+	--probe-services=https://dkyhjv0wpi2dk.cloudfront.net/ \
+	--tunnel=none \
+	web_connectivity -i https://mail.google.com/robots.txt
+
+$miniooni --yes -o E2E/o.jsonl \
+	--probe-services=https://api.ooni.io/ \
+	--tunnel=tor \
+	web_connectivity -i https://mail.google.com/robots.txt
+
+$miniooni --yes -o E2E/o.jsonl \
+	--probe-services=https://api.ooni.io/ \
+	--tunnel=psiphon \
+	web_connectivity -i https://mail.google.com/robots.txt
+
+$miniooni --yes -o E2E/o.jsonl \
+	--probe-services=https://api.ooni.io/ \
+	--tunnel=torsf \
+	web_connectivity -i https://mail.google.com/robots.txt
+
+go run ./internal/cmd/e2epostprocess -expected 6 -backend https://api.ooni.io/