Add support for ILM transition (#10565)

This PR adds transition support for ILM
to transition data to another MinIO target
represented by a storage class ARN. Subsequent
GET or HEAD for that object will be streamed from
the transition tier. If PostRestoreObject API is
invoked, the transitioned object can be restored for
duration specified to the source cluster.

cmd/object-api-datatypes.go

@@ -163,6 +163,15 @@ type ObjectInfo struct {
 	// to a delete marker on an object.
 	DeleteMarker bool
 
+	// TransitionStatus indicates if transition is complete/pending
+	TransitionStatus string
+
+	// RestoreExpires indicates date a restored object expires
+	RestoreExpires time.Time
+
+	// RestoreOngoing indicates if a restore is in progress
+	RestoreOngoing bool
+
 	// A standard MIME type describing the format of the object.
 	ContentType string