GIDTokenClaimsInternalOptions Implementation + Unit Tests #550 #840

Job	Run time
spm-build-test (macos-15, iphonesimulator)	5m 1s
spm-build-test (macos-15, macosx)	2m 30s
pod-lib-lint (macos-13, GoogleSignIn.podspec, --use-static-frameworks)	11m 19s
pod-lib-lint (macos-13, GoogleSignIn.podspec)	14m 27s
pod-lib-lint (macos-13, GoogleSignInSwiftSupport.podspec, --use-static-frameworks)	11m 17s
pod-lib-lint (macos-13, GoogleSignInSwiftSupport.podspec)	8m 55s
	53m 29s

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