test(e2e, ios): re-enable firestore compile acceleration

this one is flaky for me locally so it goes back and forth. It is
working for me now though and is so much faster I'm always willing to try

Author: mikehardy

tests/ios/Podfile

@@ -35,7 +35,7 @@ target 'testing' do
   # pod 'FirebaseFirestore', :git => 'https://github.com/invertase/firestore-ios-sdk-frameworks.git', :tag => $FirebaseSDKVersion
 
   # If leveldb auto-inclusion fails and build fails with leveldb symbol conflicts, use this subspec:
-  #pod 'FirebaseFirestore/WithoutLeveldb', :git => 'https://github.com/invertase/firestore-ios-sdk-frameworks.git', :tag => $FirebaseSDKVersion
+  pod 'FirebaseFirestore/WithoutLeveldb', :git => 'https://github.com/invertase/firestore-ios-sdk-frameworks.git', :tag => $FirebaseSDKVersion
 
   # Enables Flipper.
   #