Don't widen unique symbol for different declarations

[jakebailey]

Fixes #55901

This is mainly for discussion for now. It appears as though this case is needed in some cases, e.g. in tests/baselines/reference/uniqueSymbolsDeclarations.errors.txt.

uniqueSymbolsDeclarations.ts(104,7): error TS2527: The inferred type of 'constInitToLReadonlyType' references an inaccessible 'unique symbol' type. A type annotation is necessary.
uniqueSymbolsDeclarations.ts(105,7): error TS2527: The inferred type of 'constInitToLReadonlyNestedType' references an inaccessible 'unique symbol' type. A type annotation is necessary.

Which is what @DanielRosenwasser hinted at.

[jakebailey]

These are the cases this breaks an would need to be solved differently; perhaps we can detect this through visibility instead.

[jakebailey]

These kinds of changes don't make me happy and probably indicate that this change is probably not good as-is.

[RyanCavanaugh]

@typescript-bot pack this

[typescript-bot]

Heya @RyanCavanaugh, I've started to run the tarball bundle task on this PR at f632137. You can monitor the build here.

[typescript-bot]

Hey @RyanCavanaugh, 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/158089/artifacts?artifactName=tgz&fileId=F7153853B7D6F5D594DCF79391E2AE0F7D0F43ABAC1928C16C90E1A02229729502&fileName=/typescript-5.3.0-insiders.20231004.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]".;

[jakebailey]

referencing #55860 before I delete this branch