[llvm] workflows/release-binaries: Run tests on the same runner as the build (PR #162421)

[via llvm-commits]

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@@ -225,9 +225,25 @@
       run: |
         mv ../workflows-main .
 
-    - name: Setup Stage
+    - name: Install Ninja
+      uses: llvm/actions/install-ninja at a1ea791b03c8e61f53a0e66f2f73db283aa0f01e # main
+
+    - name: Setup Windows
+      if: startsWith(runner.os, 'Windows')
+      uses: llvm/actions/setup-windows at main
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github-advanced-security[bot] wrote:

## Unpinned tag for a non-immutable Action in workflow

Unpinned 3rd party Action 'Release Binaries' step [Uses Step](1) uses 'llvm/actions/setup-windows' with ref 'main', not a pinned commit hash

[Show more details](https://github.com/llvm/llvm-project/security/code-scanning/1476)

https://github.com/llvm/llvm-project/pull/162421