clean searchResolvers in server (#11114)

Introduces break in change

- remove search... resolvers
- rename globalSearch to search
- rename searchRecord.objectSingularName > objectNameSingular
closes https://github.com/twentyhq/core-team-issues/issues/643

packages/twenty-server/src/engine/utils/get-resolver-name.util.ts

@@ -41,8 +41,6 @@ export const getResolverName = (
     case 'restoreMany':
       return `restore${pascalCase(objectMetadata.namePlural)}`;
 
-    case 'search':
-      return `search${pascalCase(objectMetadata.namePlural)}`;
     default:
       throw new Error(`Unknown resolver type: ${type}`);
   }