Aggregate queries follow up (#9581)

In this PR

- fixing Collapse on view groups views: aggregate bar should be included
in the collapse (@magrinj )
- respect the html table pattern: the aggregate bar is now a <tr>
element included in a <table> (before that, it was a <tr> not included
in anything)
- add a top-border on the aggregate bar
- introduce short labels for the on-cell value display (display "Empty"
instead of "Count empty" to lighten the interface)
- remove the feature flag !

packages/twenty-server/src/database/typeorm-seeds/core/feature-flags.ts

@@ -70,11 +70,6 @@ export const seedFeatureFlags = async (
         workspaceId: workspaceId,
         value: false,
       },
-      {
-        key: FeatureFlagKey.IsAggregateQueryEnabled,
-        workspaceId: workspaceId,
-        value: true,
-      },
       {
         key: FeatureFlagKey.IsCommandMenuV2Enabled,
         workspaceId: workspaceId,