windows: unify non-core spawn handling across acp qmd and docker (openclaw#31750) thanks @Takhoffman

Verified:
- pnpm install --frozen-lockfile
- pnpm build
- pnpm check (fails on pre-existing unrelated src/slack/monitor/events/messages.ts typing errors)
- pnpm vitest run src/acp/client.test.ts src/memory/qmd-manager.test.ts src/agents/sandbox/docker.execDockerRaw.enoent.test.ts src/agents/sandbox/docker.windows.test.ts extensions/acpx/src/runtime-internals/process.test.ts

Co-authored-by: Takhoffman <781889+Takhoffman@users.noreply.github.com>

src/memory/qmd-manager.test.ts

@@ -899,6 +899,8 @@ describe("QmdMemoryManager", () => {
       expect(qmdCalls.length).toBeGreaterThan(0);
       for (const call of qmdCalls) {
         expect(call[0]).toBe("qmd.cmd");
+        const options = call[2] as { shell?: boolean } | undefined;
+        expect(options?.shell).toBe(true);
       }
 
       await manager.close();
@@ -1408,6 +1410,8 @@ describe("QmdMemoryManager", () => {
       );
       expect(mcporterCall).toBeDefined();
       expect(mcporterCall?.[0]).toBe("mcporter.cmd");
+      const options = mcporterCall?.[2] as { shell?: boolean } | undefined;
+      expect(options?.shell).toBe(true);
 
       await manager.close();
     } finally {