Improve FUTDC handling of copy items under UseCommonOutputDirectory

The [docs](https://learn.microsoft.com/en-us/visualstudio/ide/how-to-change-the-build-output-directory?view=vs-2022#to-place-all-solution-outputs-in-a-common-directory) describe `UseCommonOutputDirectory` as:

> Setting `UseCommonOutputDirectory` to `true` tells Visual Studio and its underlying build engine (MSBuild) that you're putting multiple project outputs in the same folder, and so MSBuild omits the copying step that normally happens when projects depend on other projects.

The FUTDC tracks copy items, but doesn't take into account the value of `UseCommonOutputDirectory`.

We should understand how this property impacts the selection of items we need to track, and change the logic accordingly.

The customer impact here is that we may either build more often than we need to, or may copy more files into the output than needed (if using Build Acceleration).