[NVIDIA GPU] Introduce Monitoring Integration

[strawgate]

Proposed commit message

Introduce NVIDIA GPU Monitoring Integration

Checklist

• I have reviewed tips for building integrations and this pull request is aligned with them.
• I have verified that all data streams collect metrics or logs.
• I have added an entry to my package's changelog.yml file.
• I have verified that Kibana version constraints are current according to guidelines.
• I have verified that any added dashboard complies with Kibana's Dashboard good practices

Author's Checklist

How to test this PR locally

Deploy NVIDIA DGCM on a device with an NVIDIA GPU to get a prometheus metrics endpoint that you can provide to the integration.

If you have docker this just requires:

docker run -d --gpus all --rm -p 9400:9400 nvcr.io/nvidia/k8s/dcgm-exporter:3.3.9-3.6.1-ubuntu22.04
curl localhost:9400/metrics

Configure the integration to point at the host running the container and GPU http://nvidiahost:9400/metrics

Some metrics are not enabled by default with the container, enabling all metrics requires some extra steps.

Related issues

Fixes #11930

Screenshots

WIP:

[elasticmachine]

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