audit: allow specific project audits

For faster local dev, `audit-gcp.sh k8s-infra-foo` will delete and
re-export audit files just for the k8s-infra-foo project

audit/audit-gcp.sh

@@ -290,7 +290,7 @@ function audit_gcp_project_service() {
     esac
 }
 
-function main() {
+function audit_k8s_infra_gcp() {
     echo "Removing all existing GCP project audit files"
     remove_all_gcp_project_audit_files 2>&1 | indent
 
@@ -302,4 +302,15 @@ function main() {
     audit_all_projects_with_parent_id "${KUBERNETES_IO_GCP_ORG}" 2>&1 | indent
 }
 
+function main() {
+    if [ $# -gt 0 ]; then
+        for project in "$@"; do
+            echo "Exporting GCP project: ${project}"
+            audit_gcp_project "${project}" 2>&1 | indent
+        done
+    else
+        audit_k8s_infra_gcp
+    fi
+}
+
 main "$@"