wasm32-wasip1/wasm32-wasip2 tests

[lastmjs]

This PR enables as many of the automated CI test suite as possible for the wasm32-wasip1 and wasm32-wasip2 targets.

[lastmjs]

I'm opening up this draft to get some feedback. Most of the test suite from .github/workflows/ci.yml is passing. But there are 13 tests from Doc-tests rquickjs_core that aren't running. I'd like some guidance on if these Doc-tests would be valuable to run, and if we should figure out some way to get this to run. My feeling after my current round of R&D for this would be that Doc-tests aren't really possible to run on wasm32 targets, and that it would be more practical to extract those tests and run them normally, if the test coverage for those tests is desirable.

[DelSkayn]

I personally see doc tests as testing for the validity of examples given in the docs, ensuring the code there actually runs.
Useful to test for but not really necessary to run on every platform.

They shouldn't contribute meaningfully to coverage, and if they do then we should introduce non-doc tests to also provide the same coverage.