ci(wine2e): run the long-paths-off PM proof even when an earlier lane fails

The PM long-path steps do not use anything the earlier live lanes set up.
Gating them on those lanes hid the proof whenever an unrelated lane went
red. The test step still requires the long-paths-off step to succeed, so
it never runs with the runner image's setting.

.github/workflows/windows-venv-e2e.yml

@@ -85,7 +85,9 @@ jobs:
         # The runner image turns LongPathsEnabled on; 0 is the Windows default
         # most users have. A process reads the value when it starts, so only
         # later steps see it. Keep this step after every lane that expects the
-        # image's setting.
+        # image's setting. It does not depend on those lanes passing.
+        id: long_paths_off
+        if: ${{ !cancelled() }}
         shell: pwsh
         run: |
           reg add 'HKLM\SYSTEM\CurrentControlSet\Control\FileSystem' /v LongPathsEnabled /t REG_DWORD /d 0 /f
@@ -96,6 +98,7 @@ jobs:
         # The test first asserts RtlAreLongPathsEnabled() is false in its own
         # process, so this step cannot pass if the step above did not take.
         # ``-m`` replaces pyproject's addopts, which deselect ``integration``.
+        if: ${{ !cancelled() && steps.long_paths_off.outcome == 'success' }}
         shell: bash
         run: |
           set -uo pipefail