add DeleteBulk support, add sufficient deadlines per rename() (#20185)

deadlines per moveToTrash() allows for a more granular timeout
approach for syscalls, instead of an aggregate timeout.

This PR also enhances multipart state cleanup to be optimal by
removing 100's of multipart network rename() calls into single
network call.

cmd/storage-rest-common.go

@@ -20,7 +20,7 @@ package cmd
 //go:generate msgp -file $GOFILE -unexported
 
 const (
-	storageRESTVersion       = "v61" // Move all Read* calls to http.MethodGet, compact handlers and query params fields
+	storageRESTVersion       = "v62" // Introduce DeleteBulk internode API.
 	storageRESTVersionPrefix = SlashSeparator + storageRESTVersion
 	storageRESTPrefix        = minioReservedBucketPath + "/storage"
 )
@@ -43,6 +43,7 @@ const (
 	storageRESTMethodStatInfoFile   = "/sfile"
 	storageRESTMethodReadMultiple   = "/rmpl"
 	storageRESTMethodCleanAbandoned = "/cln"
+	storageRESTMethodDeleteBulk     = "/dblk"
 )
 
 const (