…144811)

#140871)

Co-authored-by: Pablo Galindo Salgado <pablogsal@gmail.com>

…in `{jit,tail-call}.yml` (#148126)

Co-authored-by: Hugo van Kemenade <1324225+hugovk@users.noreply.github.com>

_PyFrame_Copy() copied interpreter frames into generator and
frame-object storage without initializing the visited byte. Incremental
GC later reads frame->visited in mark_stacks() on non-start passes, so
copied frames could expose an uninitialized value once they became live
on a thread stack again.

Reset visited when copying a frame so copied frames start with defined
GC bookkeeping state. Preserve lltrace in Py_DEBUG builds.