[3.13] gh-117174: Add a new route in linecache to fetch interactive source code (GH-117500) (#131060)

gh-117174: Add a new route in linecache to fetch interactive source code (GH-117500)
(cherry picked from commit a931a8b32415f311008dbb3f09079aae1e6d7a3d)

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