Update flipper in RNTester and template (#31010)

Summary:
allow-large-files

RN Tester is using an old version of Flipper. This will help testing regressions in the latest version (which is installed when starting a new project). This also fixes an issue where libevent is incompatible between the one in flipper and when using hermes on iOS. To fix it I changed to use the version published on cocoapods instead of using a local podspec (see https://github.com/facebook/flipper/issues/1916).

[General] [Changed] - Update flipper

Pull Request resolved: https://github.com/facebook/react-native/pull/31010

Test Plan:
- Tested that RN tester builds and flipper works with hermes enabled / disabled and fabric on iOS
- Tested that RN tester builds and flipper works on Android

Reviewed By: fkgozali

Differential Revision: D26592317

Pulled By: PeteTheHeat

fbshipit-source-id: 2cd278c7a51b1859dab0465846b061221f07d3f6

scripts/react_native_pods.rb

@@ -64,17 +64,17 @@ def use_react_native! (options={})
   if hermes_enabled
     pod 'React-Core/Hermes', :path => "#{prefix}/"
     pod 'hermes-engine', '~> 0.7.2'
-    pod 'libevent', :podspec => "#{prefix}/third-party-podspecs/libevent.podspec"
+    pod 'libevent', '~> 2.1.12'
   end
 end
 
 def use_flipper!(versions = {}, configurations: ['Debug'])
-  versions['Flipper'] ||= '~> 0.54.0'
+  versions['Flipper'] ||= '~> 0.75.1'
   versions['Flipper-DoubleConversion'] ||= '1.1.7'
-  versions['Flipper-Folly'] ||= '~> 2.2'
+  versions['Flipper-Folly'] ||= '~> 2.5'
   versions['Flipper-Glog'] ||= '0.3.6'
   versions['Flipper-PeerTalk'] ||= '~> 0.0.4'
-  versions['Flipper-RSocket'] ||= '~> 1.1'
+  versions['Flipper-RSocket'] ||= '~> 1.3'
   pod 'FlipperKit', versions['Flipper'], :configurations => configurations
   pod 'FlipperKit/FlipperKitLayoutPlugin', versions['Flipper'], :configurations => configurations
   pod 'FlipperKit/SKIOSNetworkPlugin', versions['Flipper'], :configurations => configurations