feat(chart): export the agentgateway access log over otlp - #34

Node.js 20 is deprecated. The following actions target Node.js 20 but are being forced to run on Node.js 24: actions/cache@0057852bfaa89a56745cba8c7296529d2fc39830, actions/setup-go@40f1582b2485089dde7abd97c1529aa768e1baff, azure/setup-helm@v4. For more information see: https://github.blog/changelog/2025-09-19-deprecation-of-node-20-on-github-actions-runners/