[Bug sanitizer/95137] Sanitizers seem to be missing support for coroutines

[iains at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=95137

--- Comment #11 from Iain Sandoe <iains at gcc dot gnu.org> ---
perhaps I have some invalid sharing of trees that only causes an issue for
ubsan - will try build independent dtor trees for the two cases.