[3.14] GH-139653: Only raise an exception (or fatal error) when the stack pointer...

[3.14] GH-139653: Only raise an exception (or fatal error) when the stack pointer is about to overflow the stack. (GH-141711) (GH-141944)

Only raises if the stack pointer is both below the limit *and* above the stack base.
This prevents false positives for user-space threads, as the stack pointer will be outside those bounds
if the stack has been swapped.

Cherry-picked from commit c25a070759952b13f97ecc37ca2991c2669aee47

Co-authored-by: Mark Shannon <mark@hotpy.org>