Remove partName, partETag requirement (#9044)

This is a precursor change before versioning,
removes/deprecates the requirement of remembering
partName and partETag which are not useful after
a multipart transaction has finished.

This PR reduces the overall size of the backend
JSON for large file uploads.

cmd/xl-v1-healing_test.go

@@ -60,6 +60,10 @@ func TestUndoMakeBucket(t *testing.T) {
 }
 
 func TestHealObjectCorrupted(t *testing.T) {
+	resetGlobalHealState()
+
+	defer resetGlobalHealState()
+
 	nDisks := 16
 	fsDirs, err := getRandomDisks(nDisks)
 	if err != nil {