Add initial AuthSchemeProvider codegen#4025

gosar merged 6 commits intofeature/master/sra-identity-authaws/aws-sdk-java-v2:feature/master/sra-identity-authfrom

gosar/sra-ia-authScheme-service-interfacesaws/aws-sdk-java-v2:gosar/sra-ia-authScheme-service-interfacesCopy head branch name to clipboard