Upgrade: [dependabot] - bump actions/upload-artifact from 4 to 7

Bumps [actions/upload-artifact](https://github.com/actions/upload-artifact) from 4 to 7.
- [Release notes](https://github.com/actions/upload-artifact/releases)
- [Commits](actions/upload-artifact@v4...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/run_cpsu_load.yml

@@ -97,7 +97,7 @@ jobs:
         run: |
           ./scripts/run_cpsu_load_test.sh 
 
-      - uses: actions/upload-artifact@v4
+      - uses: actions/upload-artifact@v7
         if: always()
         name: Upload test_report
         with:

.github/workflows/run_notify_load.yml

@@ -107,7 +107,7 @@ jobs:
         run: |
           ./scripts/run_notify_load_test.sh 
 
-      - uses: actions/upload-artifact@v4
+      - uses: actions/upload-artifact@v7
         if: always()
         name: Upload test_report
         with:

.github/workflows/run_psu_load.yml

@@ -97,7 +97,7 @@ jobs:
         run: |
           ./scripts/run_psu_load_test.sh 
 
-      - uses: actions/upload-artifact@v4
+      - uses: actions/upload-artifact@v7
         if: always()
         name: Upload test_report
         with: