Enable building native projects for windows arm64 (#55145)

Fixes building aspnetcore for windows arm64 in the VMR.

## Description

Right now the native projects are only built when targetting x86/x64 architectures. This causes an issue in the VMR because we're building windows arm64 in a separate job and aspnetcore fails because of the missing native assets.

The desktop msbuild build for the native projects was disabled for arm64, enable it to match the other architectures.

Author: akoeplinger

eng/Build.props

@@ -114,7 +114,7 @@
                         Include="$(RepoRoot)src\Installers\Rpm\**\*.*proj" />
       </ItemGroup>
 
-      <ItemGroup Condition=" '$(TargetOsName)' == 'win' AND ('$(TargetArchitecture)' == 'x86' OR '$(TargetArchitecture)' == 'x64') ">
+      <ItemGroup Condition=" '$(TargetOsName)' == 'win' AND ('$(TargetArchitecture)' == 'x86' OR '$(TargetArchitecture)' == 'x64' OR '$(TargetArchitecture)' == 'arm64') ">
         <NativeProjects Include="$(RepoRoot)src\**\*.vcxproj" Exclude="@(ProjectToExclude)" AdditionalProperties="Platform=x64" />
         <NativeProjects Include="$(RepoRoot)src\**\*.vcxproj" Exclude="@(ProjectToExclude)" AdditionalProperties="Platform=Win32" />
         <NativeProjects Include="$(RepoRoot)src\**\*.vcxproj" Exclude="@(ProjectToExclude)" AdditionalProperties="Platform=arm64" />

eng/build.ps1

@@ -52,7 +52,7 @@ Run publishing.
 Debug or Release
 
 .PARAMETER Architecture
-The CPU architecture to build for (x64, x86, arm). Default=x64
+The CPU architecture to build for (x64, x86, arm64). Default=x64
 
 .PARAMETER Projects
 A list of projects to build. Globbing patterns are supported, such as "$(pwd)/**/*.csproj"
@@ -66,7 +66,7 @@ You can also use -NoBuildManaged to suppress this project type.
 
 .PARAMETER BuildNative
 Build native projects (C++).
-This is the default for x64 and x86 builds but useful when you want to build _only_ native projects.
+This is the default but useful when you want to build _only_ native projects.
 You can use -NoBuildNative to suppress this project type.
 
 .PARAMETER BuildNodeJS
@@ -150,7 +150,7 @@ param(
     [ValidateSet('Debug', 'Release')]
     $Configuration,
 
-    [ValidateSet('x64', 'x86', 'arm', 'arm64')]
+    [ValidateSet('x64', 'x86', 'arm64')]
     $Architecture = 'x64',
 
     # A list of projects which should be built.
@@ -316,8 +316,7 @@ if ($BuildNodeJS) { $dotnetBuildArguments += "/p:BuildNodeJS=true" }
 # Don't bother with two builds if just one will build everything. Ignore super-weird cases like
 # "-Projects ... -NoBuildJava -NoBuildManaged -NoBuildNodeJS". An empty `./build.ps1` command will build both
 # managed and native projects.
-$performDesktopBuild = ($BuildInstallers -and $Architecture -ne "arm") -or `
-    ($BuildNative -and -not $Architecture.StartsWith("arm", [System.StringComparison]::OrdinalIgnoreCase))
+$performDesktopBuild = $BuildInstallers -or $BuildNative
 $performDotnetBuild = $BuildJava -or $BuildManaged -or $BuildNodeJS -or `
     ($All -and -not ($NoBuildJava -and $NoBuildManaged -and $NoBuildNodeJS)) -or `
     ($Projects -and -not ($BuildInstallers -or $specifiedBuildNative))

eng/scripts/RunHelix.ps1

@@ -19,7 +19,7 @@
 .PARAMETER RunQuarantinedTests
     By default quarantined tests are not run. Set this to $true to run only the quarantined tests.
 .PARAMETER TargetArchitecture
-    The CPU architecture to build for (x64, x86, arm). Default=x64
+    The CPU architecture to build for (x64, x86, arm64). Default=x64
 .PARAMETER MSBuildArguments
     Additional MSBuild arguments to be passed through.
 #>
@@ -31,7 +31,7 @@ param(
     [string]$HelixQueues = "Windows.10.Amd64.Server20H2.Open",
     [switch]$RunQuarantinedTests,
 
-    [ValidateSet('x64', 'x86', 'arm', 'arm64')]
+    [ValidateSet('x64', 'x86', 'arm64')]
     [string]$TargetArchitecture = "x64",
 
     # Capture the rest