* reoves the old implemetnation of sourcelink and uses the newer one present in the .net SDK
* cleans up appveyor
* updates proj with sourcelink props
* adds deterministic build check as well.
* Update docs/debugging-source.md
Co-authored-by: Keegan Campbell <me@kfcampbell.com>
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Co-authored-by: Keegan Campbell <me@kfcampbell.com>