GIDTokenClaimsInternalOptions Implementation + Unit Tests #550 #842

Job	Run time
spm-build-test (macos-15, iphonesimulator)	3m 8s
pod-lib-lint (macos-13, GoogleSignInSwiftSupport.podspec)	14m 17s
spm-build-test (macos-15, macosx)	1m 27s
pod-lib-lint (macos-13, GoogleSignIn.podspec)	10m 34s
pod-lib-lint (macos-13, GoogleSignInSwiftSupport.podspec, --use-static-frameworks)	10m 42s
pod-lib-lint (macos-13, GoogleSignIn.podspec, --use-static-frameworks)	15m 11s
	55m 19s

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