Add npm run fix-asyncify task that adds the missing ASYNCIFY_ONLY items

[adamziel]

See #251

Description

With this commit, fixing Asyncify issues only requires:

1. Adding a test case that triggers a crash to packages/php-wasm/node/src/test/php-asyncify.spec.ts
2. Running: npm run fix-asyncify

The npm run fix-asyncify command

1. Runs Asyncify test suite that makes PHP trigger an async call through all known code paths. If it works, we're done. If it fails, keep going.
2. Automatically adds any missing C functions to the ASYNCIFY_ONLY list in the Dockerfile
3. Rebuilds PHP
4. Loops to 1

To make it all work, this PR:

• Converts unhandled Asyncify rejections into catchable errors thrown inside PHP.run()
• Logs PHP functions at the time of an async call, not at the time of rewinding
• Prevents Node.js from exiting or hiding the error message when the WASM module calls exit()

Follow-up work

• Add a documentation page
• Add more test cases to php-asyncify.spec.js

cc @sejas @danielbachhuber

[adamziel]

I cleaned this one up. I'll merge once the tests pass

[adamziel]

One more update needed here, I don't think all the PHP versions were correctly rebuilt