chore(acpx): move runtime test fixtures to test-utils (openclaw#40548)

Verified:
- pnpm install --frozen-lockfile
- pnpm build
- pnpm check
- pnpm test:macmini

extensions/acpx/src/runtime.test.ts

@@ -2,13 +2,13 @@ import os from "node:os";
 import path from "node:path";
 import { afterAll, beforeAll, describe, expect, it } from "vitest";
 import { runAcpRuntimeAdapterContract } from "../../../src/acp/runtime/adapter-contract.testkit.js";
+import { AcpxRuntime, decodeAcpxRuntimeHandleState } from "./runtime.js";
 import {
   cleanupMockRuntimeFixtures,
   createMockRuntimeFixture,
   NOOP_LOGGER,
   readMockRuntimeLogEntries,
-} from "./runtime-internals/test-fixtures.js";
-import { AcpxRuntime, decodeAcpxRuntimeHandleState } from "./runtime.js";
+} from "./test-utils/runtime-fixtures.js";
 
 let sharedFixture: Awaited<ReturnType<typeof createMockRuntimeFixture>> | null = null;
 let missingCommandRuntime: AcpxRuntime | null = null;