Upload code coverage to Datadog (#9132)

Author: nikita-tkachenko-datadog

.gitlab/upload_ciapp.sh

@@ -35,5 +35,20 @@ junit_upload() {
         ./results
 }
 
+# Upload code coverage results to Datadog
+coverage_upload() {
+    DD_API_KEY=$1 \
+    [email protected]:DataDog/dd-trace-java.git \
+        datadog-ci coverage upload --ignored-paths=./test-published-dependencies .
+}
+
 # Upload test results to production environment like all other CI jobs
 junit_upload "$DATADOG_API_KEY_PROD"
+junit_upload_status=$?
+
+coverage_upload "$DATADOG_API_KEY_PROD"
+coverage_upload_status=$?
+
+if [[ $junit_upload_status -ne 0 || $coverage_upload_status -ne 0 ]]; then
+  exit 1
+fi