[8.x] fix: [Search:Search Applications:Content page]Missing error text for Select searchable indices field (#200736)

[kibanamachine]

Backport

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

• fix: [Search:Search Applications:Content page]Missing error text for Select searchable indices field (#200736)

Questions ?

Please refer to the Backport tool documentation

[elasticmachine]

:green_heart: Build Succeeded

• Buildkite Build
• Commit: fe2dc8b0f9d1150f444172edc082c96eae2ceeea

Metrics [docs]

Async chunks

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

id	before	after	diff
enterpriseSearch	2.6MB	2.6MB	+406.0B

cc @alexwizp