Refactor duplication of hard coded soft delete filter logic (#10058)

This PR adds a useCheckIsSoftDeleteFilter hook instead of the
undocumented in-place logic to retrieve the soft delete filter.

Also took the opportunity to refactor a recent change of @prastoin with
it.

Split VariantFilterChip into SoftDeleteFilterChip and RecordFilterChip
to separate concerns about this soft delete filtering.

packages/twenty-front/src/modules/context-store/utils/__tests__/computeContextStoreFilters.test.ts

@@ -45,7 +45,6 @@ describe('computeContextStoreFilters', () => {
     const contextStoreFilters: RecordFilter[] = [
       {
         id: 'name-filter',
-        variant: 'default',
         fieldMetadataId: personObjectMetadataItem.fields.find(
           (field) => field.name === 'name',
         )!.id,