upload filter cache

Signed-off-by: Anas Nashif <[email protected]>

Author: nashif

.github/workflows/twister.yaml

@@ -128,6 +128,14 @@ jobs:
         if:  github.event_name == 'push'
         run: |
           ./scripts/twister --cmake-only -T samples/syncronization --outdir filter_cache
+      - name: Upload Filter Cache
+        if: always()
+        uses: actions/upload-artifact@v4
+        with:
+          name: Filter Cache
+          if-no-files-found: ignore
+          path: |
+            filter_cache
 
   twister-build:
     runs-on: