fix(go-build-alpine): honour OONI_PSIPHON_TAGS (#968)

Closes https://github.com/ooni/probe/issues/2334.

While there, reinstate integration tests, which were also lost in a previous refactoring. However, only run those tests for linux/amd64 because we can be confident that the Go compiler is WAI for all archs we support.

While there, always use bash for running end-to-end tests.

H/T @ainghazal for discovering and reporting this bug.

E2E/ooniprobe.bash

@@ -0,0 +1,19 @@
+#!/bin/bash
+
+# This test for now uses --no-collector and we just ensure that the OONI
+# instance is not exploding. We are confident that, if miniooni submits
+# measurements, also ooniprobe should be able to do that. However, it would
+# actually be nice if someone could enhance this script to also make sure
+# that we can actually fetch the measurements we submit.
+
+set -euxo pipefail
+
+if [ "$#" != 1 ]; then
+    echo "Usage: $0 <binary>" 1>&2
+    exit 1
+fi
+
+$1 onboard --yes
+
+# Important! DO NOT run performance from CI b/c it will overload m-lab servers
+$1 run websites --config cmd/ooniprobe/testdata/testing-config.json --no-collector