Harmonize with lint script

This avoids recompiling ginkgo every time

Author: jorbaum

scripts/subtests/unit-test

@@ -10,6 +10,8 @@ if [ "${CI:-false}" = 'false' ]; then
     flags="${flags} -p"
 fi
 pushd "${SCRIPT_DIR}/../../src" > /dev/null
-    go run github.com/onsi/ginkgo/v2/ginkgo $flags 
-popd > /dev/null
-
+    if ! command -v ginkgo &> /dev/null; then
+      go install github.com/onsi/ginkgo/v2/ginkgo@latest
+    fi
+    ginkgo $flags 
+popd > /dev/null