Finish saving test results on failure

The conformance image should be saving its results
regardless of the results of the tests. However,
with errexit set, when ginkgo gets test failures
it exits 1 which prevents saving the results
for Sonobuoy to pick up.

Fixes: #76036

cluster/images/conformance/run_e2e.sh

@@ -62,5 +62,6 @@ set -x
 /usr/local/bin/ginkgo "${ginkgo_args[@]}" /usr/local/bin/e2e.test -- --disable-log-dump --repo-root=/kubernetes --provider="${E2E_PROVIDER}" --report-dir="${RESULTS_DIR}" --kubeconfig="${KUBECONFIG}" | tee "${RESULTS_DIR}"/e2e.log &
 set +x
 # $! is the pid of tee, not ginkgo
-wait "$(pgrep ginkgo)"
+wait "$(pgrep ginkgo)" && ret=0 || ret=$?
 saveResults
+exit ${ret}