Use 'BuiltinAsyncIterator' spelling

[rbuckton]

This renames AsyncBuiltinIterator to BuiltinAsyncIterator, which is a more accurate description of the definition.

[rbuckton]

Missed a few places, will update momentarily

[rbuckton]

Ok, that should cover it.

[rbuckton]

@typescript-bot: pack this

[typescript-bot]

Starting jobs; this comment will be updated as builds start and complete.

Command	Status	Results
pack this	✅ Started	✅ Results

[typescript-bot]

Hey @rbuckton, I've packed this into an installable tgz. You can install it for testing by referencing it in your package.json like so:

{
    "devDependencies": {
        "typescript": "https://typescript.visualstudio.com/cf7ac146-d525-443c-b23c-0d58337efebc/_apis/build/builds/162918/artifacts?artifactName=tgz&fileId=BA526FFF7A19032F6739C287430EBFC95B5D36BDDC1675CFE4E3C3BB666CC90402&fileName=/typescript-5.6.0-insiders.20240722.tgz"
    }
}

and then running npm install.

---

There is also a playground for this build and an npm module you can use via "typescript": "npm:@typescript-deploys/[email protected]".;