Refactor SingleRecordPicker to handle morphs (#14956)

## Scope

- Refactor SingleRecordPicker to handle morphItem and match Multiple one
- fix query generation to take morph into account


Left: 
- double check SingleRecordPicker in Workflows / Form
- Fix tests / stories

packages/twenty-front/src/modules/object-metadata/utils/formatSearchRecordAsSingleRecordPickerRecord.ts

@@ -1,23 +0,0 @@
-import { getAvatarType } from '@/object-metadata/utils/getAvatarType';
-import { getBasePathToShowPage } from '@/object-metadata/utils/getBasePathToShowPage';
-import { type SingleRecordPickerRecord } from '@/object-record/record-picker/single-record-picker/types/SingleRecordPickerRecord';
-import { type SearchRecord } from '~/generated/graphql';
-
-export const formatSearchRecordAsSingleRecordPickerRecord = (
-  searchRecord: SearchRecord,
-): SingleRecordPickerRecord => {
-  return {
-    id: searchRecord.recordId,
-    name: searchRecord.label,
-    avatarUrl: searchRecord.imageUrl ?? undefined,
-    avatarType: getAvatarType(searchRecord.objectNameSingular),
-    linkToShowPage:
-      getBasePathToShowPage({
-        objectNameSingular: searchRecord.objectNameSingular,
-      }) + searchRecord.recordId,
-    record: {
-      id: searchRecord.recordId,
-      __typename: searchRecord.objectNameSingular,
-    },
-  };
-};