Two warnings on `wasm32-wasi Non-Debug PR` buildbot

[sobolevn]

Bug report

Link: https://buildbot.python.org/#/builders/1373/builds/538/steps/11/logs/warnings__57_

../../Modules/_testcapimodule.c:2428:13: warning: unused function 'finalize_thread_hang_cleanup_callback' [-Wunused-function]
1 warning generated.
../../Modules/_testcapi/long.c:231:28: warning: comparison of integers of different signs: 'long' and 'digit' (aka 'unsigned int') [-Wsign-compare]
1 warning generated.

I have a PR with the fix.

Linked PRs

• gh-135709: Fix two compile warnings on WASM buildbot #135712
• [3.14] gh-135709: Fix two compile warnings on WASM buildbot (GH-135712) #135723