[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>

x-pack/plugins/features/server/oss_features.ts

@@ -518,6 +518,31 @@ export const buildOSSFeatures = ({
         },
       },
     },
+    {
+      id: 'savedQueryManagement',
+      name: i18n.translate('xpack.features.savedQueryManagementFeatureName', {
+        defaultMessage: 'Saved Query Management',
+      }),
+      order: 1750,
+      category: DEFAULT_APP_CATEGORIES.management,
+      app: ['kibana'],
+      catalogue: [],
+      privilegesTooltip: i18n.translate('xpack.features.savedQueryManagementTooltip', {
+        defaultMessage:
+          'If set to "All", saved queries can be managed across Kibana in all applications that support them. If set to "None", saved query privileges will be determined independently by each application.',
+      }),
+      privileges: {
+        all: {
+          app: ['kibana'],
+          catalogue: [],
+          savedObject: {
+            all: ['query'],
+            read: [],
+          },
+          ui: ['saveQuery'],
+        }, // No read-only mode supported
+      },
+    },
   ] as KibanaFeatureConfig[];
 };