Resmoke sets the "take core dump" flag for the hang analyzer when `ASAN_OPTIONS` is not set to avoid taking core dumps on asan because of shadow memory.

https://github.com/10gen/mongo/blob/2a0652d07064e8078d089f9e3924e2f4a0feb158/buildscripts/resmokelib/sighandler.py#L160

However, we share our sanatizer options between asan, aubsan, and ubsan so this is always set for our ubsan variants currently https://github.com/mongodb/mongo/blob/6888a1472e002d9e1fe741a670261b28e45b2ab7/etc/evergreen.yml#L2084

We also check for `ASAN_OPTIONS` here https://github.com/mongodb/mongo/blob/2a0652d07064e8078d089f9e3924e2f4a0feb158/buildscripts/resmokelib/testing/hooks/cleanup.py#L23-L24 which restarts the test fixture more often which isn't needed on UBSan because we don't be doing leak detection without ASan

Original slack thread: https://mongodb.slack.com/archives/C0V79S1PY/p1692207555012019