Update `AddScopes` to include previously requested `tokenClaims` in the… #866

Job	Run time
spm-build-test (macos-15, iphonesimulator)	4m 16s
pod-lib-lint (macos-13, GoogleSignInSwiftSupport.podspec)	13m 34s
pod-lib-lint (macos-13, GoogleSignIn.podspec)	12m 52s
pod-lib-lint (macos-13, GoogleSignIn.podspec, --use-static-frameworks)	15m 1s
spm-build-test (macos-15, macosx)	2m 20s
pod-lib-lint (macos-13, GoogleSignInSwiftSupport.podspec, --use-static-frameworks)	10m 52s
	58m 55s

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