Test against newer health check module

[nicholaschiasson]

I think we should try to prefer this newer health check module. It is noted that it is still in development, however, it has support for prometheus output and also nginx stream module.

Update the ./.github/actions/nginx-module-toolbox/Dockerfile and ./scripts/build.sh files to make nginx build against this healthcheck module rather than the current one. One thing to be careful of is the patches. I know this new repo uses a weird naming convention for those patches...