Bump actions/upload-artifact from 6 to 7

Bumps [actions/upload-artifact](https://github.com/actions/upload-artifact) from 6 to 7.
- [Release notes](https://github.com/actions/upload-artifact/releases)
- [Commits](actions/upload-artifact@v6...v7)

---
updated-dependencies:
- dependency-name: actions/upload-artifact
  dependency-version: '7'
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

.github/workflows/tests.yaml

@@ -283,7 +283,7 @@ jobs:
         if: >
           always() &&
           (steps.run_tests.outcome == 'success' || steps.run_tests.outcome == 'failure')
-        uses: actions/upload-artifact@v6
+        uses: actions/upload-artifact@v7
         with:
           name: ${{ env.TEST_ID }}
           path: reports
@@ -293,7 +293,7 @@ jobs:
         if: >
           always() &&
           (steps.run_tests.outcome == 'success' || steps.run_tests.outcome == 'failure')
-        uses: actions/upload-artifact@v6
+        uses: actions/upload-artifact@v7
         with:
           name: ${{ env.TEST_ID }}_cluster_dumps
           path: test_cluster_dump
@@ -307,7 +307,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Upload
-        uses: actions/upload-artifact@v6
+        uses: actions/upload-artifact@v7
         with:
           name: Event File
           path: ${{ github.event_path }}