Add Cilium Tetragon integration

[mjwolf]

Proposed commit message

Add an integration to capture data from Cilium Tetragon.

As Tetragon is a cloud-native tool, the deployment model of this integration is a bit different than most. It doesn't require, or support, being installed with Elastic Agent or Fleet. Instead, data is ingested by setting up a filebeat sidecar container in the Tetragon k8s pod. The instructions on how to do this are in the integration README.

This integration mainly exists as an easy way to package the elasticsearch assets required, the ingest pipeline and index template, and to make support for Tetragon easy to find by having it published in the package registry.

There are no dashboards included with this integration because the Tetragon data can work with the existing default security dashboards.

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

How to test this PR locally

Follow steps from the integration's README to install the integration with Tetragon

[elasticmachine]

Pinging @elastic/sec-deployment-and-devices (Team:Security-Deployment and Devices)

[elasticmachine]

💔 Build Failed

• Buildkite Build
• Commit: 2abbac2

Failed CI Steps

• Check integrations tetragon

History

[elastic-sonarqube]

Quality Gate failed

Failed conditions
28.5% Coverage on New Code (required ≥ 80%)

See analysis details on SonarQube