Implement Clone Snapshot API (#5240)

Implement Clone Snapshot API

- Implement new API
- Remove CRUD snapshot tests and replace with coordinated tests
- Move tests to IntrusiveOperationCluster

Author: stevejgordon

src/Nest/Descriptors.Snapshot.cs

@@ -62,6 +62,8 @@ protected CleanupRepositoryDescriptor(): base()
 	public partial class CloneSnapshotDescriptor : RequestDescriptorBase<CloneSnapshotDescriptor, CloneSnapshotRequestParameters, ICloneSnapshotRequest>, ICloneSnapshotRequest
 	{
 		internal override ApiUrls ApiUrls => ApiUrlsLookups.SnapshotClone;
+		protected override HttpMethod HttpMethod => HttpMethod.PUT;
+		protected override bool SupportsBody => true;
 		///<summary>/_snapshot/{repository}/{snapshot}/_clone/{target_snapshot}</summary>
 		///<param name = "repository">this parameter is required</param>
 		///<param name = "snapshot">this parameter is required</param>
@@ -349,4 +351,4 @@ protected VerifyRepositoryDescriptor(): base()
 		///<summary>Explicit operation timeout</summary>
 		public VerifyRepositoryDescriptor Timeout(Time timeout) => Qs("timeout", timeout);
 	}
-}
+}

src/Nest/Requests.Snapshot.cs

@@ -107,6 +107,8 @@ public partial class CloneSnapshotRequest : PlainRequestBase<CloneSnapshotReques
 	{
 		protected ICloneSnapshotRequest Self => this;
 		internal override ApiUrls ApiUrls => ApiUrlsLookups.SnapshotClone;
+		protected override HttpMethod HttpMethod => HttpMethod.PUT;
+		protected override bool SupportsBody => true;
 		///<summary>/_snapshot/{repository}/{snapshot}/_clone/{target_snapshot}</summary>
 		///<param name = "repository">this parameter is required</param>
 		///<param name = "snapshot">this parameter is required</param>
@@ -624,4 +626,4 @@ public Time Timeout
 			set => Q("timeout", value);
 		}
 	}
-}
+}

tests/Tests/Modules/SnapshotAndRestore/Snapshot/CloneSnapshot/CloneSnapshotApiTests.cs

@@ -4,7 +4,7 @@
 
 using System;
 using Elastic.Elasticsearch.Xunit.XunitPlumbing;
-using Elasticsearch.Net;
+using Elastic.Transport;
 using Nest;
 using Tests.Core.ManagedElasticsearch.Clusters;
 using Tests.Framework.EndpointTests;