[3.13] gh-130145: fix `loop.run_forever` when loop is already running (GH-130146) (#130147)

gh-130145: fix `loop.run_forever` when loop is already running (GH-130146)
(cherry picked from commit a545749b0e6c56cab853c5c8df3c199b9707994f)

Co-authored-by: Kumar Aditya <kumaraditya@python.org>