Fix Windows release smoke import library staging

Author: tazarov

.github/workflows/release.yml

@@ -379,7 +379,8 @@ jobs:
               '${{ matrix.import_library_name }}'
           )"
           if [[ -f "$import_lib_path" ]]; then
-            cp "$import_lib_path" "dist/${{ matrix.platform_id }}/${{ matrix.import_library_name }}"
+            r2_dir="$(dirname "${{ steps.package.outputs.r2-path }}")"
+            cp "$import_lib_path" "$r2_dir/${{ matrix.import_library_name }}"
           fi
 
       - name: Record windows dependent DLLs

scripts/release/test_release_workflow_contracts.py

@@ -44,6 +44,19 @@ def test_windows_packaging_uses_workspace_absolute_out_dir(self) -> None:
         )
         self.assertNotIn("out-dir: dist/${{ matrix.platform_id }}", windows_section)
 
+    def test_windows_import_library_is_preserved_next_to_staged_dll(self) -> None:
+        workflow_text = RELEASE_WORKFLOW.read_text(encoding="utf-8")
+        windows_section = workflow_text.split("- name: Preserve windows import library", 1)[1]
+
+        self.assertIn(
+            'r2_dir="$(dirname "${{ steps.package.outputs.r2-path }}")"',
+            windows_section,
+        )
+        self.assertIn(
+            'cp "$import_lib_path" "$r2_dir/${{ matrix.import_library_name }}"',
+            windows_section,
+        )
+
 
 if __name__ == "__main__":
     unittest.main()