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

buf.yaml

@@ -16,8 +16,6 @@ breaking:
     - temporal/api/enums/v1/failed_cause.proto
     # TODO: remove this once the changes with WorkflowExecutionExtendedInfo.pause_info is merged
     - temporal/api/workflow/v1/message.proto
-    # TODO: remove this once is_replication_enabled -> enable_replication rename is merged
-    - temporal/api/operatorservice/v1/request_response.proto
 lint:
   use:
     - DEFAULT

openapi/openapiv2.json

@@ -10642,6 +10642,10 @@
         "isConnectionEnabled": {
           "type": "boolean",
           "description": "A flag to indicate if a connection is active."
+        },
+        "isReplicationEnabled": {
+          "type": "boolean",
+          "description": "A flag to indicate if replication is enabled."
         }
       }
     },

temporal/api/operatorservice/v1/request_response.proto

@@ -109,6 +109,8 @@ message ClusterMetadata {
     int32 history_shard_count = 5;
     // A flag to indicate if a connection is active.
     bool is_connection_enabled = 6;
+    // A flag to indicate if replication is enabled.
+    bool is_replication_enabled = 8;
 }
 
 message GetNexusEndpointRequest {