deps: bump codecov/codecov-action from 3 to 4

Bumps [codecov/codecov-action](https://github.com/codecov/codecov-action) from 3 to 4.
- [Release notes](https://github.com/codecov/codecov-action/releases)
- [Changelog](https://github.com/codecov/codecov-action/blob/main/CHANGELOG.md)
- [Commits](codecov/codecov-action@v3...v4)

---
updated-dependencies:
- dependency-name: codecov/codecov-action
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <[email protected]>

.github/workflows/build-reusable.yml

@@ -101,7 +101,7 @@ jobs:
     - name: Upload Coverage
       if: success() || failure()
       # Keep to v3 until issues revolving around coverage files not being found are resolved
-      uses: codecov/codecov-action@v3
+      uses: codecov/codecov-action@v4
       with:
         # Hard copy from step above due to https://github.com/actions/runner/issues/2204
         directory: ${{ runner.temp }}/cov_results