ci: collect sonar coverage in go container

Jenkinsfile

@@ -97,14 +97,22 @@ spec:
 
     stage('Collect SonarQube evidence') {
       steps {
-        container('quality-tools') {
+        container('go-tester') {
           sh '''#!/usr/bin/env bash
             set -euo pipefail
             mkdir -p build
             export GOFLAGS='-buildvcs=false'
-            if [ ! -s build/coverage.out ]; then
-              go test ./... -coverprofile=build/coverage.out
-            fi
+            set +e
+            go test ./... -coverprofile=build/coverage.out
+            coverage_rc=$?
+            set -e
+            printf '%s\n' "${coverage_rc}" > build/sonarqube-coverage.rc
+          '''
+        }
+        container('quality-tools') {
+          sh '''#!/usr/bin/env bash
+            set -euo pipefail
+            mkdir -p build
             args=(
               "-Dsonar.host.url=${SONARQUBE_HOST_URL}"
               "-Dsonar.login=${SONARQUBE_TOKEN}"