build: bundle the VC redist in the installer

With the work to enable ARM64, we need to package the redistributable
into the toolchain to allow distribution via winget.  This is also
important to make the runtime work without additional packaging.

Author: compnerd

utils/build-windows-toolchain.bat

@@ -973,6 +973,8 @@ msbuild %SourceRoot%\swift-installer-scripts\platforms\Windows\bundle\installer.
   -p:BaseReleaseDownloadUrl=https://download.swift.org/development/windows ^
   -p:Configuration=Release ^
   -p:BaseOutputPath=%PackageRoot%\online\ ^
+  -p:VCRedistInstaller=%VCToolsRedistDir%\vc_redist.%VSCMD_ARG_TGT_ARCH%.exe ^
+  -p:VSVersion=%VSCMD_VER% ^
   -p:DEVTOOLS_ROOT=%BuildRoot%\Library\Developer\Toolchains\unknown-Asserts-development.xctoolchain ^
   -p:TOOLCHAIN_ROOT=%BuildRoot%\Library\Developer\Toolchains\unknown-Asserts-development.xctoolchain ^
   -p:PLATFORM_ROOT=%PlatformRoot%\ ^
@@ -987,6 +989,8 @@ msbuild %SourceRoot%\swift-installer-scripts\platforms\Windows\bundle\installer.
   -p:BundleFlavor=offline ^
   -p:Configuration=Release ^
   -p:BaseOutputPath=%PackageRoot%\offline\ ^
+  -p:VCRedistInstaller=%VCToolsRedistDir%\vc_redist.%VSCMD_ARG_TGT_ARCH%.exe ^
+  -p:VSVersion=%VSCMD_VER% ^
   -p:DEVTOOLS_ROOT=%BuildRoot%\Library\Developer\Toolchains\unknown-Asserts-development.xctoolchain ^
   -p:TOOLCHAIN_ROOT=%BuildRoot%\Library\Developer\Toolchains\unknown-Asserts-development.xctoolchain ^
   -p:PLATFORM_ROOT=%PlatformRoot%\ ^