[llvm] [CI] switch to BuildTools variant of Visual Studio (PR #201335)

[Charles Zablit via llvm-commits]

https://github.com/charles-zablit created https://github.com/llvm/llvm-project/pull/201335

Follow up to:
- https://github.com/swiftlang/swift-docker/pull/566
- https://github.com/swiftlang/swift-docker/pull/565

It's no longer necessary to install packaging at runtime and the new image will use `BuildTools`.

>From 5417b8187eec427c2be20c53d0de31944b9067e3 Mon Sep 17 00:00:00 2001
From: Charles Zablit <c_zablit at apple.com>
Date: Wed, 3 Jun 2026 13:00:11 +0100
Subject: [PATCH] [CI] switch to BuildTools variant of Visual Studio

---
 .ci/green-dragon/lldb-windows.groovy | 4 +---
 1 file changed, 1 insertion(+), 3 deletions(-)

diff --git a/.ci/green-dragon/lldb-windows.groovy b/.ci/green-dragon/lldb-windows.groovy
index 48224479f1d28..c80782888bd24 100644
--- a/.ci/green-dragon/lldb-windows.groovy
+++ b/.ci/green-dragon/lldb-windows.groovy
@@ -49,9 +49,7 @@ pipeline {
                 timeout(240) {
                     catchError(buildResult: 'FAILURE', stageResult: 'FAILURE') {
                         writeFile file: 'build.bat', text: '''@echo off
-call "C:\\Program Files\\Microsoft Visual Studio\\2022\\Community\\VC\\Auxiliary\\Build\\vcvars64.bat" || exit /b 1
-
-"C:\\Program Files\\Python313\\python.exe" -m pip install packaging || exit /b 1
+call "C:\\Program Files\\Microsoft Visual Studio\\2022\\BuildTools\\VC\\Auxiliary\\Build\\vcvars64.bat" || exit /b 1
 
 cmake -G Ninja ^
     -S llvm ^