Google Sign-In 9.0.0

• Allow providing a custom nonce via GSI to AppAuth (#402, #476)
• Fix invalid error code in GIDSignIn (#472)
• Add support for GTMAppAuth 5 on macOS (#522)
• Fix Data Protected migration bugs (#533)
• Internal
  • Add AppAuthCore as explicit dependency (#470)
  • Update iPhone simulator from 14 to 15 (#494)
  • Fix swift button integration test (#497)
  • Update runner to macos-13 (#498)
  • Update scorecards.yml to use upload-artifact@v4.6.2 (#516)
  • Update AppAuth and GTMAppAuth dependencies (#517, #521)
  • Fix Swift integration tests for a returning user (#518)
  • Update .gitignore to include .build and Package.resolved (#520)
  • Update GIDSignInTest to correctly setUp and tearDown NSUserDefaults (#527)