fix: [fs] an error upon rwPool.Write() just attempt rwPool.Create() (#10533)

On some NFS clients looks like errno is incorrectly set,
which leads to incorrect errors thrown upwards.

cmd/fs-v1-rwpool.go

@@ -157,6 +157,9 @@ func (fsi *fsIOPool) Write(path string) (wlk *lock.LockedFile, err error) {
 		case isSysErrIsDir(err):
 			return nil, errIsNotRegular
 		default:
+			if isSysErrPathNotFound(err) {
+				return nil, errFileNotFound
+			}
 			return nil, err
 		}
 	}