add flakey test (#56080)

It's flakey for turbopack

Closes WEB-1671

Co-authored-by: kodiakhq[bot] <49736102+kodiakhq[bot]@users.noreply.github.com>

test/build-turbopack-tests-manifest.js

@@ -62,6 +62,9 @@ const SKIPPED_TEST_SUITES = {
   'test/integration/trailing-slashes/test/index.test.js': [
     'Trailing slashes dev mode, with basepath, trailingSlash: true /docs/linker?href=/ should navigate to /docs/',
   ],
+  'test/integration/app-document-remove-hmr/test/index.test.js': [
+    '_app removal HMR should HMR when _document is removed',
+  ],
 }
 
 async function updatePassingTests() {

test/turbopack-tests-manifest.json

@@ -6355,13 +6355,10 @@
     "runtimeError": false
   },
   "test/integration/app-document-remove-hmr/test/index.test.js": {
-    "passed": [
-      "_app removal HMR should HMR when _app is removed",
-      "_app removal HMR should HMR when _document is removed"
-    ],
+    "passed": ["_app removal HMR should HMR when _app is removed"],
     "failed": [],
     "pending": [],
-    "flakey": [],
+    "flakey": ["_app removal HMR should HMR when _document is removed"],
     "runtimeError": false
   },
   "test/integration/app-document-style-fragment/test/index.test.js": {
@@ -14597,7 +14594,7 @@
       "Trailing slashes production mode, trailingSlash: true /linker?href=/catch-all/hello/ should have href /catch-all/hello/",
       "Trailing slashes production mode, trailingSlash: true /linker?href=/catch-all/hello/ should navigate to /catch-all/hello/",
       "Trailing slashes production mode, trailingSlash: true /linker?href=/catch-all/hello/ should push route to /catch-all/hello/",
-      "Trailing slashes production mode, trailingSlash: true should have a redirect in the routesmanifest",
+      "Trailing slashes production mode, trailingSlash: true should have a trailing redirect in the routesmanifest",
       "Trailing slashes production mode, with basepath, trailingSlash: true /docs should redirect to /docs/",
       "Trailing slashes production mode, with basepath, trailingSlash: true /docs/about should redirect to /docs/about/",
       "Trailing slashes production mode, with basepath, trailingSlash: true /docs/catch-all/hello.world/ should redirect to /docs/catch-all/hello.world",