CPP Open Source build fixes:

- Updated Cocoapods to 10.14.0 to fix an auth dependency.
- Auth: cmake file - suppressed the inclusion of desktop dependencies for android and iOS builds.
- Messaging: added the main source directory to the include path for the firebase_messaging_test_util build target.
- Messaging: removed firebase_messaging_test build target for desktop builds.

PiperOrigin-RevId: 288966108

Author: Googler

ios_pod/Podfile

@@ -2,18 +2,18 @@ source 'https://github.com/CocoaPods/Specs.git'
 platform :ios, '8.0'
 
 target 'GetPods' do
-  pod 'Firebase/Core', '6.10.0'
+  pod 'Firebase/Core', '6.14.0'
 
-  pod 'Firebase/AdMob', '6.10.0'
-  pod 'Firebase/Analytics', '6.10.0'
-  pod 'Firebase/Auth', '6.10.0'
-  pod 'Firebase/Database', '6.10.0'
-  pod 'Firebase/DynamicLinks', '6.10.0'
-  pod 'Firebase/Functions', '6.10.0'
+  pod 'Firebase/AdMob', '6.14.0'
+  pod 'Firebase/Analytics', '6.14.0'
+  pod 'Firebase/Auth', '6.14.0'
+  pod 'Firebase/Database', '6.14.0'
+  pod 'Firebase/DynamicLinks', '6.14.0'
+  pod 'Firebase/Functions', '6.14.0'
   pod 'FirebaseInstanceID', '4.2.5'
-  pod 'Firebase/Messaging', '6.10.0'
-  pod 'Firebase/RemoteConfig', '6.10.0'
-  pod 'Firebase/Storage', '6.10.0'
+  pod 'Firebase/Messaging', '6.14.0'
+  pod 'Firebase/RemoteConfig', '6.14.0'
+  pod 'Firebase/Storage', '6.14.0'
 
   pod 'Crashlytics', '3.13.4'
 end