[Log threshold alert] Remove technical preview from alert details page

[benakansara]

Partially resolves #172379

Removes "Technical Preview" and "Tell us what you think!" from the Log threshold alert details page.

[apmmachine]

🤖 GitHub comments

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Just comment with:

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

[elasticmachine]

Pinging @elastic/obs-ux-management-team (Team:obs-ux-management)

[kibana-ci]

💚 Build Succeeded

• Buildkite Build
• Commit: 9143540

Metrics [docs]

Module Count

Fewer modules leads to a faster build time

id	before	after	diff
observability	516	515	-1

Async chunks

Total size of all lazy-loaded chunks that will be downloaded as the user navigates the app

id	before	after	diff
observability	1.1MB	1.1MB	-466.0B

To update your PR or re-run it, just comment with:
@elasticmachine merge upstream

cc @benakansara