[9.1] [Docs] Convert asciidoc lifecycle markers into new syntax (#236292) (#236541)

# Backport

This will backport the following commits from `main` to `9.1`:
- [[Docs] Convert asciidoc lifecycle markers into new syntax
(#236292)](#236292)

<!--- Backport version: 10.0.2 -->

### Questions ?
Please refer to the [Backport tool
documentation](https://github.com/sorenlouv/backport)

<!--BACKPORT
[{"author":{"name":"florent-leborgne","email":"florent.leborgne@elastic.co"},"sourceCommit":{"committedDate":"2025-09-26T07:53:52Z","message":"[Docs]
Convert asciidoc lifecycle markers into new syntax
(#236292)\n\nPreview/Beta/Deprecated information is handled using a
specific syntax\nin markdown docs. This PR removes some outdated
(asciidoc) markers and\ninstead adds the expected syntax where
appropriate.\n\nRel:
https://github.com/elastic/docs-content/issues/2951","sha":"86e0a47b58420a2c2da3dc38e98fbbed46740a2d","branchLabelMapping":{"^v9.2.0$":"main","^v(\\d+).(\\d+).\\d+$":"$1.$2"}},"sourcePullRequest":{"labels":["Team:Docs","release_note:skip","docs","backport:version","v9.2.0","v9.0.8","v9.1.5"],"title":"[Docs]
Convert asciidoc lifecycle markers into new
syntax","number":236292,"url":"https://github.com/elastic/kibana/pull/236292","mergeCommit":{"message":"[Docs]
Convert asciidoc lifecycle markers into new syntax
(#236292)\n\nPreview/Beta/Deprecated information is handled using a
specific syntax\nin markdown docs. This PR removes some outdated
(asciidoc) markers and\ninstead adds the expected syntax where
appropriate.\n\nRel:
https://github.com/elastic/docs-content/issues/2951","sha":"86e0a47b58420a2c2da3dc38e98fbbed46740a2d"}},"sourceBranch":"main","suggestedTargetBranches":["9.0","9.1"],"targetPullRequestStates":[{"branch":"main","label":"v9.2.0","branchLabelMappingKey":"^v9.2.0$","isSourceBranch":true,"state":"MERGED","url":"https://github.com/elastic/kibana/pull/236292","number":236292,"mergeCommit":{"message":"[Docs]
Convert asciidoc lifecycle markers into new syntax
(#236292)\n\nPreview/Beta/Deprecated information is handled using a
specific syntax\nin markdown docs. This PR removes some outdated
(asciidoc) markers and\ninstead adds the expected syntax where
appropriate.\n\nRel:
https://github.com/elastic/docs-content/issues/2951","sha":"86e0a47b58420a2c2da3dc38e98fbbed46740a2d"}},{"branch":"9.0","label":"v9.0.8","branchLabelMappingKey":"^v(\\d+).(\\d+).\\d+$","isSourceBranch":false,"state":"NOT_CREATED"},{"branch":"9.1","label":"v9.1.5","branchLabelMappingKey":"^v(\\d+).(\\d+).\\d+$","isSourceBranch":false,"state":"NOT_CREATED"}]}]
BACKPORT-->

Author: florent-leborgne