Changes

#44386 (Sep 29, 2025, 4:44:29 PM)

1. testenv-coredump-helper: remove — Oliver Smith / detail
2. scripts/wrapper_core_bt_on_error: new script — Oliver Smith / detail
3. jobs/master,gerrit: use wrapper_core_bt_on_error — Oliver Smith / detail
4. jobs/master,gerrit: set CFLAGS=-g — Oliver Smith / detail