[docs] Rest entry distribution

Adding a release note for this issue:

[discrete]
== Retrieving distribution of cache entries
You can now invoke `GET` requests to retrieve details for data distribution of

{brandname} cache entry.

* Retrieve data distribution for a cache entry:
+
[source,options="nowrap",subs=attributes+]
----
GET /rest/v2/caches/{cacheName}/{cacheKey}?action=distribution
----
+{brandname}

responds with the following details:

• A confirmation if the key exists and a list of nodes that contain the key
• Names of the nodes where the entry exists
• List of the IP addresses and ports where the node can be accessed
• Identifies the primary owner and backup nodes

For more information see _

{brandname}

REST API Guide_ link:

{rest_docs}

#rest_v2_distribution_entries[Retrieving entry distribution].