BuildInParallel=false needed for arm64 installers (vcxproj)

[HaoK]

Is there an existing issue for this?

• I have searched the existing issues

Describe the bug

I needed to disable parallel builds for the installers due to what looks like issues around native up to date checks:

@dougbu asked for this issue to track why this was needed

More generally, the problems you hit earlier indicate a wider problem w/ up-to-date (not fast up-to-date) checks in our native projects. The native project references shouldn't cause any rebuilds of the work done in earlier steps. Please file a fairly urgent issue to get to the root of this.

Expected Behavior

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Steps To Reproduce

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Exceptions (if any)

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.NET Version

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Anything else?

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We're moving this issue to the .NET 8 Planning milestone for future evaluation / consideration. We would like to keep this around to collect more feedback, which can help us with prioritizing this work. We will re-evaluate this issue, during our next planning meeting(s).
If we later determine, that the issue has no community involvement, or it's very rare and low-impact issue, we will close it - so that the team can focus on more important and high impact issues.
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