Source build artifacts has more than doubled in size in 10.0

[MichaelSimons]

Looking at the currently referenced source build artifacts tarball (from 10.0 P2), it is 1.81 GB while the most recent release of 9.0.1xx is right around 800 MB. Doing a quick investigation, I see that all symbols.nupkg packages are getting bundled. I would expect these to be included in the separate symbols tarballs. Distro maintainers' build systems are sensitive to the artifact size. It is needless to include the symbols and greatly slows down the prep time.

When fixing consider what type of validation could be added to prevent such regressions in the future.

[NikolaMilosavljevic]

This issue is unrelated to packaging of symbols in a separate archive. Symbols (PDBs) are collected using a completely different method, and not from symbols nupkgs.

The issue here is with current code that is supposed to condition out symbols nupkgs when creating the PSB archive. It appears that the current code never worked. This has suddenly become apparent as repo publishing process is now publishing these symbols nupkgs, even in source-build, which was not the case before.