Upgrade CLI, restore prev status check value (#39077)

Summary:
Pull Request resolved: https://github.com/facebook/react-native/pull/39077

Follow-up to https://github.com/facebook/react-native/pull/38988.

- Upgrade to RN CLI `12.0.0-alpha.11`.
- Restore previous value check against `/status` response in test scripts (restored in above CLI alpha).

Changelog: [Internal]

Reviewed By: motiz88

Differential Revision: D48432629

fbshipit-source-id: 175241ad75676281f4638e179873b2ce32f0ea3e

scripts/objc-test.sh

@@ -73,26 +73,6 @@ waitForWebSocketServer() {
   echo "WebSocket Server is ready!"
 }
 
-waitForPackagerAlt() {
-  local -i max_attempts=60
-  local -i attempt_num=1
-
-  # TODO(huntie): Temporary string match in JSON response. We will revert
-  # this endpoint back to "packager-status:running" in the next CLI alpha.
-  until curl -s http://localhost:8081/status | grep "\"status\":\"running\"" -q; do
-    if (( attempt_num == max_attempts )); then
-      echo "Packager did not respond in time. No more attempts left."
-      exit 1
-    else
-      (( attempt_num++ ))
-      echo "Packager did not respond. Retrying for attempt number $attempt_num..."
-      sleep 1
-    fi
-  done
-
-  echo "Packager is ready!"
-}
-
 runTests() {
   # shellcheck disable=SC1091
   source "$ROOT/scripts/.tests.env"
@@ -151,7 +131,7 @@ main() {
 
     # Start the packager
     yarn start --max-workers=1 || echo "Can't start packager automatically" &
-    waitForPackagerAlt
+    waitForPackager
     preloadBundlesRNTester
     preloadBundlesRNIntegrationTests
 

scripts/testing-utils.js

@@ -117,12 +117,6 @@ function isPackagerRunning(
       silent: true,
     }).stdout;
 
-    // TODO(huntie): Temporary string match in JSON response. We will revert
-    // this endpoint back to "packager-status:running" in the next CLI alpha.
-    if (status.includes('"status":"running"')) {
-      return 'running';
-    }
-
     return status === 'packager-status:running' ? 'running' : 'unrecognized';
   } catch (_error) {
     return 'not_running';