### 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
+ other
                + "]";
        assert b == false || this.currentNodeId().equals(other.relocatingNodeId)
            : "ShardRouting is a relocation source but current node isn't equal to other's relocating node."
                + " This ["
                + this
                + "], other ["
                + other
                + "]";
        assert b == false || other.currentNodeId().equals(this.relocatingNodeId)
            : "ShardRouting is a relocation source but relocating node isn't equal to other's current node."
                + " This ["
                + this
                + "], other ["
                + other
                + "]";
        assert b == false || this.shardId.equals(other.shardId)
            : "ShardRouting is a relocation source but both indexRoutings are not of the same shard."
                + " This ["
                + this
                + "], target ["
                + other
                + "]";
        assert b == false || this.primary == other.primary
            : "ShardRouting is a relocation source but primary flag is different. This [" + this + "], target [" + other + "]";
        return b;
    }
    
    public boolean equalsIgnoringMetadata(ShardRouting other) {
        return primary == other.primary