fix: remove parent dirs in RenameData upon failure (#12452)

- it is possible that during I/O failures we might
  leave partially written directories, make sure
  we purge them after.

- rename current data-dir (null) versionId only after
  the newer xl.meta has been written fully.

- attempt removal once for minioMetaTmpBucket/uuid/
  as this folder is empty if all previous operations
  were successful, this allows avoiding recursive os.Remove()

cmd/storage-rest_test.go

@@ -356,10 +356,10 @@ func testStorageAPIDeleteFile(t *testing.T, storage StorageAPI) {
 		expectErr  bool
 	}{
 		{"foo", "myobject", false},
-		// should removed by above case.
-		{"foo", "myobject", true},
-		// file not found error
-		{"foo", "yourobject", true},
+		// file not found not returned
+		{"foo", "myobject", false},
+		// file not found not returned
+		{"foo", "yourobject", false},
 	}
 
 	for i, testCase := range testCases {