### Description

It should be enough to have ShardId + nodeId key in `routingToDataPath` to find the necessary data path. 
Changing the key would allow us to minimize the size of ClusterInfo size and find the data path when shard changes its status.

`ClusterInfo` might be sent over the wire when cluster allocation explain is executed with `includeDiskInfo=true`.
ShardRouting -> ShardId + nodeId conversion is trivial. The oposit would require additional information that could be faked.

Current key is also used in here:
https://github.com/elastic/elasticsearch/blob/9ebbe1c62bf0157d332f20f392544a1921a710df/server/src/main/java/org/elasticsearch/cluster/ClusterInfo.java#L149-L154
where it produces a string with ShardRouting#shortSummary that is excessive and might be simplified to ShardId + nodeId as well
server/src/main/java/org/elasticsearch/cluster/routing/ShardRouting.java
}
        if (recoverySource != null) {
            sb.append(", recovery_source[").append(recoverySource).append("]");
        }
        sb.append(", s[").append(state).append("]");
        if (allocationId != null) {
            sb.append(", a").append(allocationId);
        }
        if (unassignedInfo != null) {
            sb.append(", ").append(unassignedInfo);
        }
        sb.append(", ").append(relocationFailureInfo);
        if (expectedShardSize != UNAVAILABLE_EXPECTED_SHARD_SIZE) {
            sb.append(", expected_shard_size[").append(expectedShardSize).append("]");
        }
        return sb.toString();
    }
    @Override
    public XContentBuilder toXContent(XContentBuilder builder, Params params) throws IOException {
        builder.startObject()
            .field("state", state())
            .field("primary", primary())
            .field("node", currentNodeId())
            .field("relocating_node", relocatingNodeId())
            .field("shard", id())
            .field("index", getIndexName());
        if (expectedShardSize != UNAVAILABLE_EXPECTED_SHARD_SIZE && state != ShardRoutingState.STARTED) {
            builder.field("expected_shard_size_in_bytes", expectedShardSize);
        }
        if (recoverySource != null) {