[Kibana] New "Saved Query Management" privilege to allow saving queries across Kibana (#166937)

- Resolves https://github.com/elastic/kibana/issues/158173

Based on PoC https://github.com/elastic/kibana/pull/166260

## Summary

This PR adds a new "Saved Query Management" privilege with 2 options:
- `All` will override any per app privilege and will allow users to save
queries from any Kibana page
- `None` will default to per app privileges (backward-compatible option)

<img width="600" alt="Screenshot 2023-09-21 at 15 26 25"
src="6d53548e-5c5a-4d6d-a86a-1e639cb77202">

### Checklist

- [x] Any text added follows [EUI's writing
guidelines](https://elastic.github.io/eui/#/guidelines/writing), uses
sentence case text and includes [i18n
support](https://github.com/elastic/kibana/blob/main/packages/kbn-i18n/README.md)
- [x] [Unit or functional
tests](https://www.elastic.co/guide/en/kibana/master/development-tests.html)
were updated or added to match the most common scenarios

---------

Co-authored-by: Matthias Wilhelm <matthias.wilhelm@elastic.co>
Co-authored-by: kibanamachine <42973632+kibanamachine@users.noreply.github.com>
Co-authored-by: Stratoula Kalafateli <efstratia.kalafateli@elastic.co>

.buildkite/ftr_configs.yml

@@ -310,6 +310,7 @@ enabled:
   - x-pack/test/functional/apps/reporting_management/config.ts
   - x-pack/test/functional/apps/rollup_job/config.ts
   - x-pack/test/functional/apps/saved_objects_management/config.ts
+  - x-pack/test/functional/apps/saved_query_management/config.ts
   - x-pack/test/functional/apps/security/config.ts
   - x-pack/test/functional/apps/snapshot_restore/config.ts
   - x-pack/test/functional/apps/spaces/config.ts