Update schema to include trimming-related properties & item types #7805
Description
Update src/MSBuild/MSBuild)/Microsoft.Build.CommonTypes.xsd with the various options and item types used for trimming, so that they show up in the MSBuild file editor in Visual Studio, e.g.:
<TrimMode><IsTrimmable><SuppressTrimAnalysisWarnings><EnableTrimAnalyzer><TrimmerDefaultAction><TrimmerSingleWarn><ILLinkWarningLevel><ILLinkTreatWarningsAsErrors><TrimmerRemoveSymbols><DebuggerSupport><TrimmerRootAssembly /><TrimmerRootDescriptor /><TrimmableAssembly />- more