Opt File Based Apps into `TrackFileWritesShareableOutsideOfProjectDirectory`

[baronfel]

Is your feature request related to a problem? Please describe.

FBA use an outside-of-the-project-cone layout for storing outputs, at least for Intermediate outputs stored in TEMP - this is prone to cleanup/incrementality issues that are solved in 10+ through use of the TrackFileWritesShareableOutsideOfProjectDirectory mechanism. Since FBA don't use Artifacts Layout (for a few design reasons that I'm working through with @DamianEdwards), they need to opt into this property explicitly to get the correctness benefits.

See dotnet/msbuild#12096 for details about the problem and the solution.

[jjonescz]

The artifacts are explicitly included for cleaning, but I guess that doesn't solve this problem?

sdk/test/dotnet.Tests/CommandTests/Run/RunFileTests.cs

Line 4469 in 0c50b1d

<Clean Include="/artifacts/*" />