[improve] Athenz auth provider supports Copper Argos #960
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Motivation
As with the Java client (cf. apache/pulsar#19445), make the Athenz auth provider for the Go client support Copper Argos.
Modifications
Added new parameters
x509CertChain
andcaCert
to the Athenz auth provider. If the parameterx509CertChain
is passed, the auth provider assumes that Copper Argos is used and presents the X.509 certificate to obtain a role token from ZTS. Existing users will not be affected by this change.Verifying this change