CI: hack to shorten windows paths

 - win has a 32k char process arg limit
 - test classpath args for the junit JVM can go over this limit if
   the workspace path is too long and the process will fail to start
 - this moves the workspace close to the drive letter as workaround

.github/workflows/main.yml

@@ -2417,8 +2417,20 @@ jobs:
         exclude:
           - os: ${{ (contains(github.event.pull_request.labels.*.name, 'PHP') || contains(github.event.pull_request.labels.*.name, 'ci:all-tests') || github.event_name != 'pull_request') && 'nothing' || 'windows-latest' }}
       fail-fast: false
+    defaults:
+      run:
+        # hack: shorten paths to stay below 32k char process arg limit of windows
+        working-directory: ${{ contains(matrix.os, 'windows') && 'D:\\nb' || github.workspace }} 
+
     steps:
 
+      - name: shorten paths for windows
+        if: contains(matrix.os, 'windows') 
+        run: |
+          mkdir nb && cd nb
+          echo "$(pwd)" > GITHUB_WORKSPACE
+        working-directory: "D:\\"
+
       - name: Set up JDK ${{ matrix.java }} 
         uses: actions/setup-java@v4
         with:
@@ -2444,6 +2456,7 @@ jobs:
         uses: actions/download-artifact@v4
         with:
           name: build
+          path: $GITHUB_WORKSPACE
 
       - name: Extract
         run: tar --zstd -xf build.tar.zst
@@ -2544,7 +2557,7 @@ jobs:
         uses: test-summary/action@v2
         if: failure()
         with:
-          paths: "./*/*/build/test/*/results/TEST-*.xml"
+          paths: "$GITHUB_WORKSPACE/*/*/build/test/*/results/TEST-*.xml"
 
 
   lsp-test: