[TypeSpecValidation] Promote errors to GitHub Errors

[mikeharder]

Errors from TSV (and TSVAll) should be promoted to "GitHub Errors", ideally with file and line numbers, including all the parallel jobs. Ideally exclude duplicate errors from windows and linux.

Errors when running tsp compile in TSV should be promoted to "GitHub Errors" including file and line number, so they can appear in the PR file diff. We might be able to use "Problem Matchers": https://github.com/actions/toolkit/blob/main/docs/problem-matchers.md. If not, we can parse it manually in TSV.