Disregard healing disks in crawling (#10349)

When crawling never use a disk we know is healing.

Most of the change involves keeping track of the original endpoint on xlStorage
and this also fixes DiskInfo.Endpoint never being populated.

Heal master will print `data-crawl: Disk "http://localhost:9001/data/mindev/data2/xl1" is 
Healing, skipping` once on a cycle (no more often than every 5m).

cmd/object-api-common.go

@@ -82,7 +82,7 @@ func dirObjectInfo(bucket, object string, size int64, metadata map[string]string
 // Depending on the disk type network or local, initialize storage API.
 func newStorageAPI(endpoint Endpoint) (storage StorageAPI, err error) {
 	if endpoint.IsLocal {
-		storage, err := newXLStorage(endpoint.Path, endpoint.Host)
+		storage, err := newXLStorage(endpoint)
 		if err != nil {
 			return nil, err
 		}