feature(chore):965 added error handling for irs response

tx-backend/src/test/java/org/eclipse/tractusx/traceability/integration/policy/PolicyControllerIT.java

@@ -88,7 +88,7 @@ void shouldReturnNotFoundGetPolicyById() throws JoseException {
                 .get("/api/policies/" + policyId)
                 .then()
                 .statusCode(404)
-                .body(containsString("Policy with id: default-policy-not-exist not found."))
+                .body(containsString("404 Not Found: [no body]"))
                 .log().all();
     }