[7.x] [Logs UI] Load <LogStream> entries via async searches (#86899)

[weltenwort]

Backports the following commits to 7.x:

• [Logs UI] Load entries via async searches ([Logs UI] Load <LogStream> entries via async searches #86899)

[kibanamachine]

💚 Build Succeeded

• continuous-integration/kibana-ci/pull-request
• Commit: cf4d336

Metrics [docs]

Module Count

Fewer modules leads to a faster build time

id	before	after	diff
infra	1101	1108	+7

Async chunks

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

id	before	after	diff
infra	2.2MB	2.2MB	+29.8KB

Page load bundle

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

id	before	after	diff
infra	172.1KB	172.3KB	+213.0B

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