fix(server): return the right range for the original source file of DTS

[ivanwonder]

When the user tries to go to the definition that is in the DTS file,
the Angular LS will map it to the original source file. Because of
not updating the scriptInfo, the Angular LS returns the wrong range
of the definition.

[ivanwonder]

I can't find a way to add a test for it. there is no way to convert lsp.Range which is made up of start and end positions to TypeScript's absolute offsets out of the server. and getting the content of a file by the fs is not a good way.

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