[3.13] gh-135815: skip `netrc` security checks if `os.getuid` is missing (GH-135816) (#135826)

gh-135815: skip `netrc` security checks if `os.getuid` is missing (GH-135816)
(cherry picked from commit b57b619e34cdfc87b47943c988b0b4d69f8f1fe4)

Co-authored-by: Bénédikt Tran <10796600+picnixz@users.noreply.github.com>