ci: make -autofree failures easier to diagnose, test -autofree more on linux and windows too (#18929)

.github/workflows/windows_ci.yml

@@ -53,6 +53,8 @@ jobs:
         run: .\v.exe test-self
         #    - name: Test
         #      run: .\v.exe test-all
+      - name: Build option_test.v with -autofree
+        run: .\v.exe -autofree vlib/v/tests/option_test.v
       - name: Test time functions in a timezone UTC-12
         run: |
           tzutil /s "Dateline Standard Time"