ambarella-osdrv-s3l: ship the DSP microcode from SDK 2.5.0_20181109 - #2782

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. For more information see: https://github.blog/changelog/2025-09-19-deprecation-of-node-20-on-github-actions-runners/