Enable Source Link and symbol package generation during build

[lostmsu]

What does this implement/fix? Explain your changes.

This enables Source Link and symbol package generation during build.

Source Link automatically pulls library (e.g. Python.NET) source code from GitHub when debugging.

Checklist

Check all those that are applicable and complete.

• Make sure to include one or more tests for your change
• If an enhancement PR, please create docs and at best an example
• Add yourself to AUTHORS
• Updated the CHANGELOG

[codecov-io]

Codecov Report

Merging #1259 into master will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master    #1259   +/-   ##
=======================================
  Coverage   86.25%   86.25%           
=======================================
  Files           1        1           
  Lines         291      291           
=======================================
  Hits          251      251           
  Misses         40       40           

Flag	Coverage Δ
#setup_linux	64.94% <ø> (ø)
#setup_windows	72.50% <ø> (ø)

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