ci(defender): fix Bandit path-length error on Windows by enabling LongPathsEnabled (#211)

Co-authored-by: th3w1zard1 <2219836+th3w1zard1@users.noreply.github.com>
Co-authored-by: copilot-swe-agent[bot] <198982749+Copilot@users.noreply.github.com>
Co-authored-by: Boden <halomastar@gmail.com>

Author: 3 people

.github/workflows/defender-for-devops.yml

@@ -47,29 +47,12 @@ jobs:
         dotnet-version: |
           5.0.x
           6.0.x
-    - name: Shorten workspace and temp paths on Windows
+    - name: Enable long paths on Windows
       if: runner.os == 'Windows'
       shell: pwsh
       run: |
-        New-Item -ItemType Directory -Force -Path C:\msdo-temp | Out-Null
-        subst W: "$env:GITHUB_WORKSPACE"
-        "GITHUB_WORKSPACE=W:\" | Out-File -FilePath $env:GITHUB_ENV -Encoding utf8 -Append
-        "RUNNER_TEMP=C:\msdo-temp" | Out-File -FilePath $env:GITHUB_ENV -Encoding utf8 -Append
-        "TMP=C:\msdo-temp" | Out-File -FilePath $env:GITHUB_ENV -Encoding utf8 -Append
-        "TEMP=C:\msdo-temp" | Out-File -FilePath $env:GITHUB_ENV -Encoding utf8 -Append
-    - name: Shorten workspace and temp paths on Linux
-      if: runner.os == 'Linux'
-      shell: bash
-      run: |
-        mkdir -p /tmp/msdo
-        ln -sfn "$GITHUB_WORKSPACE" /tmp/msdo/workspace
-        {
-          echo "GITHUB_WORKSPACE=/tmp/msdo/workspace"
-          echo "RUNNER_TEMP=/tmp/msdo"
-          echo "TMPDIR=/tmp/msdo"
-          echo "TMP=/tmp/msdo"
-          echo "TEMP=/tmp/msdo"
-        } >> "$GITHUB_ENV"
+        Set-ItemProperty -Path "HKLM:\SYSTEM\CurrentControlSet\Control\FileSystem" -Name "LongPathsEnabled" -Value 1
+        git config --system core.longpaths true
     - name: Run Microsoft Security DevOps
       uses: microsoft/security-devops-action@v1.12.0
       id: msdo
@@ -78,8 +61,3 @@ jobs:
       with:
         sarif_file: ${{ steps.msdo.outputs.sarifFile }}
         category: msdo-${{ matrix.os }}
-    - name: Remove Windows short path mapping
-      if: always() && runner.os == 'Windows'
-      shell: pwsh
-      run: |
-        subst W: /d