chore: Upgrade github codecov action to v5 (#8048)

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**What changed?**

Upgrades our Codecov action to v5.5 to support:
* quicker execution
* tokenless upload (if we want)

Author: c-warren

.github/workflows/codecov-on-master.yml

@@ -36,9 +36,9 @@ jobs:
           GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}
         run: ./scripts/create_failed_test_issues.sh failed-tests.txt
       - name: Upload coverage reports to Codecov
-        uses: codecov/codecov-action@v4.5.0 # https://github.com/codecov/codecov-action
+        uses: codecov/codecov-action@v5.5.0 # https://github.com/codecov/codecov-action
         with:
-          file: .build/coverage/unit_cover.out
+          files: .build/coverage/unit_cover.out
           exclude: ./
           token: ${{ secrets.CODECOV_TOKEN }}
           slug: cadence-workflow/cadence

.github/workflows/codecov-on-pr.yml

@@ -23,9 +23,9 @@ jobs:
         run: make cover_profile
 
       - name: Upload coverage reports to Codecov
-        uses: codecov/codecov-action@v4.5.0 # https://github.com/codecov/codecov-action
+        uses: codecov/codecov-action@v5.5.0 # https://github.com/codecov/codecov-action
         with:
-          file: .build/coverage/unit_cover.out
+          files: .build/coverage/unit_cover.out
           exclude: ./
           token: ${{ secrets.CODECOV_TOKEN }}
           slug: cadence-workflow/cadence