RemoveAllProperties or other way to ensure single-instanced "utility" project builds

[rainersigwald]

(inciting incident is microsoft/MSBuildSdks#601 (comment) but we've had this thought for a long time)

By default, global properties for the current project flow to projects built with the MSBuild task, unless overridden or explicitly removed with RemoveProperties in the MSBuild task call. This makes some sense for "regular" projects that build things (though see #9414), but there's another use of the MSBuild task: to ensure that some operation happens exactly once during a build no matter how big that build is--for instance "get some expensive value out of the git repo state" or "generate a version file for this build". But there's no way to specify "I promise that this project I am calling will only care about the explicit list of properties I pass it" so you're forced to add a bunch of stuff to RemoveProperties="TargetFramework;Configuration;Platform;..." which is inevitably incomplete.

[jeffkl]

I was originally thinking it should be RemoveProperties="*" but that seems unconventional so instead I agree that it should just be a boolean property, RemoveAllProperties="true".