Update TinyGo templates to address static init problems

[itowlson]

E.g. this should fix static logging objects not being ready, os.Environ(), etc.

See #2184 (comment).

Marking as draft initially to verify that I haven't muddled up the changes and that I've updated CI correctly.

[itowlson]

It was Go 1.21 that introduced wasip1 but that had a lot of patches so I've bumped templates and CI to 1.22. If we'd prefer to be more conservative and use 1.21 instead then I can do that.

[itowlson]

CI failed in cabi_realloc. It works locally for me, but a possible difference is that I'm on Go 1.23 rather than 1.22. Trying updating Go in CI and will see how it goes.

[itowlson]

Hmm, it seems like the smoke test is trying to test the template in the repo not the template in the PR. Which seems like it makes the CI failure even stranger. Maybe the existing template doesn't work with tinygo 0.35 because of the wasi build target?

[itowlson]

Yes, running the existing Go template with TinyGo 0.35 / Go 1.23 reproduces the CI error.

I don't know how to validate the new template in CI so this may have to involve people accepting a Works On My Machine.

I'll roll CI back to Go 1.22, and also remove the stub main that's no longer needed.