Unwrap NoInfer-wrapped unions before conditional type distribution attempt

[Andarist]

fixes #61076

[Andarist]

@jakebailey could you prepare a playground build for this one? :p

[jakebailey]

@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

[Andarist]

I have 2 doubts here:

1. This still doesn't solve the issue with A | NoInfer<B | C>. To solve that, it feels like mapTypeWithAlias and mapType should learn how to deal with those NoInfer-wrapped unions
2. Should the conditional type's result be "repacked" into NoInfer back if needed? 🤔

[typescript-bot]

Hey @jakebailey, 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/164685/artifacts?artifactName=tgz&fileId=8CCB4161634DFD3F5FEB343C0D9567C6F11C57ECCBCE5D313B663902C239CF5802&fileName=/typescript-5.8.0-insiders.20250129.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/pr-build@5.8.0-pr-61077-3".;

[typescript-bot]

With 6.0 out as the final release vehicle for this codebase, we're closing all PRs that don't fit the merge criteria for post-6.0 patches. If you think this was a mistake and this PR fits the post-6.0 patch criteria, please post to the 6.0 iteration issue with details (specifically, which PR and which patch criteria it satisfies).

Next steps for PRs:

• For crash bugfixes or language service improvements, PRs are currently accepted at the typescript-go repo
• Changes to type system behavior should wait until after 7.0, at which point mainline TypeScript development will resume in this repository with the Go codebase
• Library file updates (lib.d.ts etc) continue to live in this repo or the DOM Generator repo as appropriate