test: new weldr client compatibility for test scripts

- Handle the array responses from the new weldr-client (>= 35.6).
- Move the `get_build_info` function to shared_libs.sh to source and
  reuse in multiple places.

test/cases/oscap.sh

@@ -9,6 +9,8 @@ OSBUILD_COMPOSER_TEST_DATA=/usr/share/tests/osbuild-composer/
 # Get OS data.
 source /etc/os-release
 
+source /usr/libexec/tests/osbuild-composer/shared_lib.sh
+
 # Colorful output.
 function greenprint {
     echo -e "\033[1;32m[$(date -Isecond)] ${1}\033[0m"
@@ -125,15 +127,6 @@ gen_iso () {
 # scans and check results
 sudo dnf install -y xmlstarlet openscap-utils scap-security-guide
 
-get_build_info() {
-    key="$1"
-    fname="$2"
-    if rpm -q --quiet weldr-client; then
-        key=".body${key}"
-    fi
-    jq -r "${key}" "${fname}"
-}
-
 # Get the compose log.
 get_compose_log () {
     COMPOSE_ID=$1