Vscode-ng-language-service: Paths with "#" not resolved correctly

[payambordbar]

If there is a # in the path of a project, the extension will not work
for example:
F:\Source\C#\My Project\client

But if we remove #, the Angular language service will work properly

[ayazhafiz]

This is a bug in Angular's URL resolver:

https://github.com/angular/angular/blob/0aa53cdd6081177ddf384eed511e10e7db458c33/packages/compiler/src/url_resolver.ts#L55-L71

As a simple reproduction, resolve('a/b/c#/d.ts', './d.html') will give back a/b/d.ts but should give back a/b/c#/d.html.

This manifests itself in the language service because when initializing a project, TypeScript calls the Angular language service plugin for external files. We return external files as the set of external templates in the project, which we compute using the url resolver:

https://github.com/angular/angular/blob/0aa53cdd6081177ddf384eed511e10e7db458c33/packages/language-service/src/typescript_host.ts#L194-L206

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