[8.13] revert change to shared UX markdown component for dashboard vis (#180906)

[eokoneyo]

Backport

This will backport the following commits from main to 8.13:

• revert change to shared UX markdown component for dashboard vis (#180906)

Questions ?

Please refer to the Backport tool documentation

\n\n### Questions ?\nPlease refer to the [Backport tool\ndocumentation](https://github.com/sqren/backport)\n\n\n\nCo-authored-by: Eyo O. Eyo <[email protected]>"}},{"branch":"main","label":"v8.15.0","labelRegex":"^v8.15.0$","isSourceBranch":true,"state":"MERGED","url":"https://github.com//pull/180906","number":180906,"mergeCommit":{"message":"revert change to shared UX markdown component for dashboard vis (#180906)\n\n## Summary\r\n\r\nThis PR reverts the change to the shared UX markdown component that\r\nhappened here https://github.com//pull/176478. The\r\naforementioned PR introduced couple of visual issues that were uncaught\r\nduring the migration.\r\n\r\nThe known issues that have been brought up that informed the decision to\r\nrevert this change, are itemised below;\r\n\r\n- https://github.com//issues/180576\r\n- https://github.com//issues/180452\r\n- https://github.com/elastic/sdh-kibana/issues/4608\r\n\r\n\r\n### Checklist\r\n\r\n- [x] [Unit or functional\r\ntests](https://www.elastic.co/guide/en/kibana/master/development-tests.html)\r\nwere updated or added to match the most common scenarios\r\n\r\n\r\n### For maintainers\r\n\r\n- [x] This was checked for breaking API changes and was [labeled\r\nappropriately](https://www.elastic.co/guide/en/kibana/master/contributing.html#kibana-release-notes-process)\r\n\r\n---------\r\n\r\nCo-authored-by: kibanamachine <[email protected]>","sha":"4127163bd913dccfbd17badbb9ce1a7a5b2afadc"}}]}] BACKPORT-->

[kibana-ci]

💛 Build succeeded, but was flaky

• Buildkite Build
• Commit: c207152

Failed CI Steps

• FTR Configs #1

Test Failures

• [job] [logs] FTR Configs #1 / endpoint Endpoint Exceptions should add event.module=endpoint to entry if only wildcard operator is present

Metrics [docs]

Module Count

Fewer modules leads to a faster build time

id	before	after	diff
visTypeMarkdown	21	19	-2

Async chunks

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

id	before	after	diff
visTypeMarkdown	7.0KB	5.8KB	-1.1KB

Page load bundle

Size of the bundles that are downloaded on every page load. Target size is below 100kb

id	before	after	diff
visTypeMarkdown	6.9KB	7.0KB	+141.0B

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

cc @eokoneyo

[elasticmachine]

Pinging @elastic/appex-sharedux (Team:SharedUX)