MINOR Use new Develocity secret for flaky test report (#20344)

Using Develocity secret for flaky test report.

Reviewers: Bill Bejeck<[email protected]>

Author: mumrah

.github/workflows/generate-reports.yml

@@ -38,6 +38,6 @@ jobs:
       - name: Run Report
         if : ${{ ! github.event.repository.fork }}
         env:
-          DEVELOCITY_ACCESS_TOKEN: ${{ secrets.DV_API_ACCESS }}
+          DEVELOCITY_ACCESS_TOKEN: ${{ secrets.KAFKA_DEVELOCITY_ACCESS_KEY }}
         run: |
           python ./.github/scripts/develocity_reports.py >> $GITHUB_STEP_SUMMARY