MDEV-14245 tokudb_alter_table.drop_add_pk_part_104 fails

"tokudb_alter_table.drop_add_pk_part_104 leaves a temporary file behind"

Fixed by copying 3 lines from 10.1 to 10.0 that cleaned up the temporary
file for partitioning tables.

sql/sql_table.cc

@@ -8840,7 +8840,9 @@ bool mysql_alter_table(THD *thd,char *new_db, char *new_name,
 
          TODO don't create the frm in the first place
       */
-      deletefrm(alter_ctx.get_tmp_path());
+      const char *path= alter_ctx.get_tmp_path();
+      table->file->ha_create_partitioning_metadata(path, NULL, CHF_DELETE_FLAG);
+      deletefrm(path);
       my_free(const_cast<uchar*>(frm.str));
       goto end_inplace;
     }