[Dexter] Avoid infinite loop in dbgeng driver

This method of the dbgeng debugger driver used to just "pass", as setting
dbgeng free running still leads to numerous errors. This wasn't a problem
in the past because, as it turns out, nothing called the go method.
However, a recent refactor uses it.

Rather than launch dbgeng free running, instead have it single step one
step forwards. This is slow, but it makes progress, where previously we

Differential Revision: https://reviews.llvm.org/D91737

GitOrigin-RevId: c8e6cde95c8c14941b87f33962e89873d0638c7e
1 file changed