Fix multi selector content not scrollable if rendered in a sheet (#45573)

## Context

Realised that MultiSelector's content is not scrollable when rendered
within a sheet (e.g Auth policies, Database indexes)

### Explanation from Claude:
- The issue is that Radix Dialog (Sheet) adds
@radix-ui/react-remove-scroll which intercepts wheel events. The Popover
portal renders outside the Sheet's DOM tree, so the scroll lock blocks
wheel events on CommandList.
- The fix is to stop wheel event propagation on the CommandList so it
doesn't reach the RemoveScroll handler.

### To test
- [ ] Verify that MultiSelector can be scrollable within a sheet (e.g
Auth policies roles) and outside of a sheet (e.g Data API -> Exposed
schemas)

<!-- This is an auto-generated comment: release notes by coderabbit.ai
-->

## Summary by CodeRabbit

* **Bug Fixes**
* Fixed scroll wheel propagation in multi-select dropdown to prevent
unintended scrolling of parent elements.

* **Updates**
* Simplified filter component interface by removing an unused
configuration property.

<!-- end of auto-generated comment: release notes by coderabbit.ai -->

apps/studio/components/grid/components/header/filter/FilterPopoverNew.tsx

@@ -20,7 +20,6 @@ import { useSqlFilterGenerateMutation } from '@/data/ai/sql-filter-mutation'
 import { useTableEditorTableStateSnapshot } from '@/state/table-editor-table'
 
 export interface FilterPopoverProps {
-  portal?: boolean
   isRefetching?: boolean
 }