feat(runtime): Set server process to run with highest system priority

[xingyaoww]

This PR modifies the server startup command to:

• Use nice -n -20 to set highest CPU scheduling priority
• Set OOM score to -1000 to make it one of the last processes to be killed
• Use sudo for elevated privileges needed for these settings

This ensures the server process runs with maximum priority and is one of the last processes to be killed by the OOM killer.

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To run this PR locally, use the following command:

docker run -it --rm   -p 3000:3000   -v /var/run/docker.sock:/var/run/docker.sock   --add-host host.docker.internal:host-gateway   -e SANDBOX_RUNTIME_CONTAINER_IMAGE=docker.all-hands.dev/all-hands-ai/runtime:7bd12a9-nikolaik   --name openhands-app-7bd12a9   docker.all-hands.dev/all-hands-ai/openhands:7bd12a9