Add vs2022 support.

Author: jpakkane

win32/install.ps1

@@ -69,6 +69,8 @@ $origPath = $env:Path
 # import visual studio variables
 if ($Compiler -eq 'msvc2019') {
   $vcvars = "C:\Program Files (x86)\Microsoft Visual Studio\2019\Enterprise\VC\Auxiliary\Build\vcvarsall.bat"
+} elseif ($Compiler -eq 'msvc2022') {
+  $vcvars = "C:\Program Files (x86)\Microsoft Visual Studio\2022\Enterprise\VC\Auxiliary\Build\vcvarsall.bat"
 } else {
   # Note: this is also for clangcl
   $vcvars = "C:\Program Files (x86)\Microsoft Visual Studio\2017\Enterprise\VC\Auxiliary\Build\vcvarsall.bat"