[Moving] Move Logs Shared folder into /x-pack/observability_solution (

#177735)

## Summary

This PR is part of the initiative to consolidate Observability plugins
into `x-pack/plugins/observability_solution`.

This was discussed and agreed upon with the Observability org in the
Observability Office Hours meeting at the end of 2023.

## Related PRs:
- [x] [Move APM ](#177433)
- [x] [Move Data Quality](#177456)
- [x] [Move Exploratory
View](#177440)
- [x] [Move Infra](#177443)
- [X] Move Logs Explorer
- [x] [Move Logs Shared](#177735)
<-- you are here
- [x] [Move Observability AI
Assistant](#177427)
- [x] [Move Observability
App](#177437)
- [x] [Move Observability
Onboarding](#177458)
- [x] [Move Observability
Shared](#177463)
- [x] [Move Profiling](#177453)
- [x] [Move Synthetics](#177464) 
- [x] [Move Uptime](#177466)
- [x] [Move UX](#177470)

---------

Co-authored-by: kibanamachine <[email protected]>

.github/CODEOWNERS

@@ -504,7 +504,7 @@ examples/locator_explorer @elastic/appex-sharedux
 packages/kbn-logging @elastic/kibana-core
 packages/kbn-logging-mocks @elastic/kibana-core
 x-pack/plugins/observability_solution/logs_explorer @elastic/obs-ux-logs-team
-x-pack/plugins/logs_shared @elastic/obs-ux-logs-team
+x-pack/plugins/observability_solution/logs_shared @elastic/obs-ux-logs-team
 x-pack/plugins/logstash @elastic/logstash
 packages/kbn-managed-content-badge @elastic/kibana-visualizations
 packages/kbn-managed-vscode-config @elastic/kibana-operations
@@ -1542,8 +1542,8 @@ x-pack/plugins/security_solution/server/lib/security_integrations @elastic/secur
 **/*.scss @elastic/kibana-design
 
 # Observability design
-/x-pack/plugins/observability_solution/infra/**/*.scss @elastic/observability-design
 /x-pack/plugins/observability_solution/apm/**/*.scss @elastic/observability-design
+/x-pack/plugins/observability_solution/infra/**/*.scss @elastic/observability-design
 /x-pack/plugins/fleet/**/*.scss @elastic/observability-design
 /x-pack/plugins/monitoring/**/*.scss @elastic/observability-design
 

api_docs/deprecations_by_plugin.mdx

@@ -1734,4 +1734,4 @@ migrates to using the Kibana Privilege model: https://github.com/elastic/kibana/
 | Deprecated API | Reference location(s) | Remove By |
 | ---------------|-----------|-----------|
 | <DocLink id="kibKibanaReactPluginApi" section="def-public.KibanaThemeProvider" text="KibanaThemeProvider"/> | [shared_imports.ts](https://github.com/elastic/kibana/tree/main/x-pack/plugins/watcher/public/application/shared_imports.ts#:~:text=KibanaThemeProvider), [index.tsx](https://github.com/elastic/kibana/tree/main/x-pack/plugins/watcher/public/application/index.tsx#:~:text=KibanaThemeProvider), [index.tsx](https://github.com/elastic/kibana/tree/main/x-pack/plugins/watcher/public/application/index.tsx#:~:text=KibanaThemeProvider), [index.tsx](https://github.com/elastic/kibana/tree/main/x-pack/plugins/watcher/public/application/index.tsx#:~:text=KibanaThemeProvider) | - |
-| <DocLink id="kibLicensingPluginApi" section="def-public.LicensingPluginSetup.license$" text="license$"/> | [plugin.ts](https://github.com/elastic/kibana/tree/main/x-pack/plugins/watcher/public/plugin.ts#:~:text=license%24), [plugin.ts](https://github.com/elastic/kibana/tree/main/x-pack/plugins/watcher/public/plugin.ts#:~:text=license%24) | 8.8.0 |
+| <DocLink id="kibLicensingPluginApi" section="def-public.LicensingPluginSetup.license$" text="license$"/> | [plugin.ts](https://github.com/elastic/kibana/tree/main/x-pack/plugins/watcher/public/plugin.ts#:~:text=license%24), [plugin.ts](https://github.com/elastic/kibana/tree/main/x-pack/plugins/watcher/public/plugin.ts#:~:text=license%24) | 8.8.0 |