Enable reading replicationEnabled (#678)

<!-- Describe what has changed in this PR -->
**What changed?**
Enable reading of new field added in AddOrUpdateRemoteClusterResponse as
these apparently aren't sharing/reusing a common proto for
reading/writing

<!-- Tell your future self why have you made these changes -->
**Why?**
Enabling reads from cli

<!-- Are there any breaking changes on binary or code level? -->
**Breaking changes**
na

<!-- If this breaks the Server, please provide the Server PR to merge
right after this PR was merged. -->
**Server PR**
temporalio/temporal#8744

cli PR - temporalio/cli#881

Author: michaely520