[RemoteRoutingTable] Reduce number of remote download call for Indices Routing

[shailendra0811]

Is your feature request related to a problem? Please describe

In the event of a node drop, read calls to indices files would be proportional to number of index changed multiplied by number of nodes in the cluster. We need to reduce the number of downloads required for node drop scenarios.

Describe the solution you'd like

To reduce the number of indices file downloads required to construct the updated routing table, we will upload/download a new routing table diff file. This file will store the incremental differences between the previous routing table and the new routing table. This approach will reduce the number of reads to 1 per node in the cluster during node drop scenarios.

Related component

ShardManagement:Resiliency

Describe alternatives you've considered

No response

Additional context

No response