[3.13] GH-121634: have `wasi.py` accept the host target triple as an argument (GH-123030) (GH-123042)

GH-121634: have `wasi.py` accept the host target triple as an argument (GH-123030)
(cherry picked from commit b15b81ed4f58196b35e3dd13b484f4c7a73e5bb8)

Co-authored-by: Brett Cannon <brett@python.org>