[Bug] setExtraLibs does only work with relative paths

Reproducible in vscode.dev or in VS Code Desktop?

• Not reproducible in vscode.dev or VS Code Desktop

Reproducible in the monaco editor playground?

• Not reproducible in the monaco editor playground

Monaco Editor Playground Link

https://microsoft.github.io/monaco-editor/playground.html?source=v0.40.0-dev.20230703#XQAAAAIUAgAAAAAAAABBqQkHQ5NjdMjwa-jY7SIQ9S7DNlzs5W-mwj0fe1ZCDRFc9ws9XQE0SJE1jc2VKxhaLFIw9vEWSxW3yscw0eXaCAEiAKctgAboa7BDW-dD5UNujAS0b7QGpwJN09LIuNc-WgzFneLy7Iihhgtyajb-EbGjjyZzBHzOnGo_GbSrt3XR8_ZQ9Vxlw__KjuG51nRj7Q6gM5njKhM7hsDbeU_9vgXyoAAGToGYP0TTMRpo2a_UwFCzQP_E5Cwoqz4ecp52khFmSPRpjC5wrzfNh-K8uIrQzMP6cj0kSV-iEXC_jbYpilgg6kD8qTSlEyVwtCTGDL4MCVGpkC96Coiyfjo8WooJmsvFdzhAfffOYmpre8SjXnUnvR9frqdmDmIGwytNNl9QUEvArrNT624u5czPG_eSq0WvRtXLzDlxMgeq2YWD3VnJW5Ur1Bde5Z4qjKSLzjFX8xGKWWWHqfKP__lsk2s

Monaco Editor Playground Code

const value = `import { Class1 } from '/aa.js';
import { Class2 } from 'myLib';
new Class1;
new Class2;`;

monaco.languages.typescript.typescriptDefaults.setExtraLibs(
[
{content:'export class Class1 {}', filePath:'/aa.js'},
{content:'export class Class2 {}', filePath:'myLib'}
]);

// Hover on each property to see its docs!
const myEditor = monaco.editor.create(document.getElementById("container"), {
	value,
	language: "typescript",
	automaticLayout: true,
});

Reproduction Steps

look at the playground code

Actual (Problematic) Behavior

As importmaps are now a thing, not only relative path could be used, but also some with a package name, wich is then resolved via importmap.
But the editor only works with imports with relative paths.

Expected Behavior

the sample provided should work and not show an error in the playground.

Additional Context

No response

Start with the playground reproduction and the setExtraLibs call in the supplied TypeScript example. Trace how the TypeScript language service resolves the relative '/aa.js' and package-like 'myLib' file paths, then verify that the sample resolves both imports without an error.