CLDSRV-977: add storeCompositeChecksums feature flag - #6257

Node.js 20 is deprecated. The following actions target Node.js 20 but are being forced to run on Node.js 24: actions/checkout@v4, actions/github-script@60a0d83039c74a4aee543508d2ffcb1c3799cdea, actions/setup-node@v4, actions/setup-python@v4, codecov/test-results-action@v1, whywaita/workflow-telemetry-action@9861d94d4f5862a5b8c5e863cf9a156a1b950738. For more information see: https://github.blog/changelog/2025-09-19-deprecation-of-node-20-on-github-actions-runners/

This action is being deprecated in favor of 'codecov-action'. Please update CI accordingly to use 'codecov-action@v5' with 'report_type: test_results'. The 'codecov-action' should and can be run at least once for coverage and once for test results