gh-99370: fix test_zippath_from_non_installed_posix (GH-99483)

When build with shared enabled, we need to set `LD_LIBRARY_PATH`
for the non-installed python environment in
test_zippath_from_non_installed_posix so that the python binary
and find and link the libpython.so.
(cherry picked from commit 1df0752b4d49103654abbc75c06b4dc0cf99de1c)

Co-authored-by: Kai Zhang <kylerzhang11@gmail.com>