Fix deep groupBy (#9996)

* fix deep _groupBy not turning to _group

* add groupBy to roles user count

* Revert "add groupBy to roles user count"

This reverts commit 16340eef5a.

api/src/utils/sanitize-query.ts

@@ -194,7 +194,8 @@ function sanitizeDeep(deep: Record<string, any>, accountability?: Accountability
 				const parsedSubQuery = sanitizeQuery({ [key.substring(1)]: value }, accountability);
 				// ...however we want to keep them for the nested structure of deep, otherwise there's no
 				// way of knowing when to keep nesting and when to stop
-				parsedLevel[key] = Object.values(parsedSubQuery)[0];
+				const [parsedKey, parsedValue] = Object.entries(parsedSubQuery)[0];
+				parsedLevel[`_${parsedKey}`] = parsedValue;
 			} else {
 				parse(value, [...path, key]);
 			}