Update flakey API support tests (#45360)

x-ref:
https://github.com/vercel/next.js/actions/runs/4027758161/jobs/6923946045

Author: ijjk

test/integration/api-support/test/index.test.js

@@ -486,22 +486,28 @@ function runTests(dev = false) {
   })
 
   it('should not warn if response body is larger than 4MB with responseLimit config = false', async () => {
-    let res = await fetchViaHTTP(appPort, '/api/large-response-with-config')
-    expect(res.ok).toBeTruthy()
-    expect(stderr).not.toContain(
-      'API response for /api/large-response-with-config exceeds 4MB. API Routes are meant to respond quickly.'
-    )
+    await check(async () => {
+      let res = await fetchViaHTTP(appPort, '/api/large-response-with-config')
+      expect(res.ok).toBeTruthy()
+      expect(stderr).not.toContain(
+        'API response for /api/large-response-with-config exceeds 4MB. API Routes are meant to respond quickly.'
+      )
+      return 'success'
+    }, 'success')
   })
 
   it('should warn with configured size if response body is larger than configured size', async () => {
-    let res = await fetchViaHTTP(
-      appPort,
-      '/api/large-response-with-config-size'
-    )
-    expect(res.ok).toBeTruthy()
-    expect(stderr).toContain(
-      'API response for /api/large-response-with-config-size exceeds 5MB. API Routes are meant to respond quickly.'
-    )
+    await check(async () => {
+      let res = await fetchViaHTTP(
+        appPort,
+        '/api/large-response-with-config-size'
+      )
+      expect(res.ok).toBeTruthy()
+      expect(stderr).toContain(
+        'API response for /api/large-response-with-config-size exceeds 5MB. API Routes are meant to respond quickly.'
+      )
+      return 'success'
+    }, 'success')
   })
 
   if (dev) {