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/debian.bash

@@ -0,0 +1,47 @@
+#!/bin/bash
+
+# This script checks whether we can install ooniprobe on debian
+# for a specific architecture using docker and the official
+# install instructions published at https://ooni.org/install.
+
+set -euo pipefail
+
+install_flow() {
+	set -x
+	export DEBIAN_FRONTEND=noninteractive
+	dpkg --add-architecture "$1"
+	apt-get update
+	apt-get install --yes gnupg
+	apt-key adv --verbose --keyserver hkp://keyserver.ubuntu.com --recv-keys 'B5A08F01796E7F521861B449372D1FF271F2DD50'
+	echo "deb [arch=$1] http://deb.ooni.org/ unstable main" | tee /etc/apt/sources.list.d/ooniprobe.list
+	apt-get update
+	apt-get install --yes ooniprobe-cli
+	dpkg -l | grep ooniprobe-cli > DEBIAN_INSTALLED_PACKAGE.txt
+}
+
+docker_flow() {
+	printf "checking for docker..."
+	command -v docker || {
+		echo "not found"
+		exit 1
+	}
+	set -x
+	docker pull debian:stable
+	docker run -v "$(pwd):/ooni" -w /ooni debian:stable ./E2E/debian.bash install "$1"
+}
+
+if [ "$1" = "docker" ]; then
+	test -n "$2" || {
+		echo "usage: $0 docker {i386,amd64,armhf,arm64}" 1>&2
+		exit 1
+	}
+	docker_flow "$2"
+
+elif [ "$1" = "install" ]; then
+	install_flow "$2"
+
+else
+	echo "usage: $0 docker {i386,amd64,armhf,arm64}" 1>&2
+	echo "       $0 install {i386,amd64,armhf,arm64}" 1>&2
+	exit 1
+fi