[8.x] Prefix inference endpoint with “obs_” (#200174)

[kibanamachine]

Backport

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

• Prefix inference endpoint with “obs_” (#200174)

Questions ?

Please refer to the Backport tool documentation

[elasticmachine]

Pinging @elastic/obs-ai-assistant (Team:Obs AI Assistant)

[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: 779277e

Metrics [docs]

✅ unchanged

cc @sorenlouv