[Enhancement] Create new transport action for fetching metadata of multiple primary & replica shards

[amkhar]

Describe the bug
Original Issue opened : #5098 . This issue is a sub task for the overall project defined #8098.

Description
As part of node drop and joins, we fetch the metadata of unassigned shards on per shard basis.

OpenSearch/server/src/main/java/org/opensearch/gateway/TransportNodesListGatewayStartedShards.java

Lines 151 to 155 in 96630f0

	protected NodeGatewayStartedShards nodeOperation(NodeRequest request) {
	try {
	final ShardId shardId = request.getShardId();
	logger.trace("{} loading local shard state info", shardId);
	ShardStateMetadata shardStateMetadata = ShardStateMetadata.FORMAT.loadLatestState(

TransportNodesListGatewayStartedShards is a transport call for getting this metadata for a single shard. We need to add a new transport for both primary and replica shards so we can fetch metadata for a batch of shards in one transport call.

Additional context
Please go through the discussion #5098 to understand the overall enhancement approach and check #8098 to see the sub tasks of overall project.

[amkhar]

Completed by

Primary batch transport #8218
Replica batch transport #8356