Upgrade actions/upload-artifact@v4, actions/download-artifact@v4 and geekyeggo/delete-artifact@v5

The workflow previously uploaded multiple artifacts under the same
'name'. This is no more allowed on v4, so we have to upload each
artifact under a unique name. When downloading we can merge multiple
artifacts using the 'pattern' matching and the `merge-multiple: true`
option.
The geekyeggo/delete-artifact instead can use the pattern matching
directly in the `name` field.

Author: cmaglie

workflow-templates/sync-labels.yml

@@ -73,13 +73,13 @@ jobs:
           file-url: https://raw.githubusercontent.com/arduino/tooling-project-assets/main/workflow-templates/assets/sync-labels/${{ matrix.filename }}
 
       - name: Pass configuration files to next job via workflow artifact
-        uses: actions/upload-artifact@v3
+        uses: actions/upload-artifact@v4
         with:
           path: |
             *.yaml
             *.yml
           if-no-files-found: error
-          name: ${{ env.CONFIGURATIONS_ARTIFACT }}
+          name: ${{ env.CONFIGURATIONS_ARTIFACT }}-${{ matrix.filename }}
 
   sync:
     needs: download
@@ -114,15 +114,16 @@ jobs:
         uses: actions/checkout@v4
 
       - name: Download configuration files artifact
-        uses: actions/download-artifact@v3
+        uses: actions/download-artifact@v4
         with:
-          name: ${{ env.CONFIGURATIONS_ARTIFACT }}
+          pattern: ${{ env.CONFIGURATIONS_ARTIFACT }}-*
+          merge-multiple: true
           path: ${{ env.CONFIGURATIONS_FOLDER }}
 
       - name: Remove unneeded artifact
-        uses: geekyeggo/delete-artifact@v2
+        uses: geekyeggo/delete-artifact@v5
         with:
-          name: ${{ env.CONFIGURATIONS_ARTIFACT }}
+          name: ${{ env.CONFIGURATIONS_ARTIFACT }}-*
 
       - name: Merge label configuration files
         run: |