[8.x] [Observability Onboarding] fix docker integration double detection (#199237)

[kibanamachine]

Backport

This will backport the following commits from main to 8.x:

• [Observability Onboarding] fix docker integration double detection (#199237)

Questions ?

Please refer to the Backport tool documentation

[github-actions]

🤖 GitHub comments

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Just comment with:

• /oblt-deploy : Deploy a Kibana instance using the Observability test environments.
• run docs-build : Re-trigger the docs validation. (use unformatted text in the comment!)

[elasticmachine]

💚 Build Succeeded

• Buildkite Build
• Commit: 303274f

Metrics [docs]

✅ unchanged

cc @flash1293