Unexpected output when org-ql-completing-read-reverse-paths is nil

Hello,

After the change at 4c1a4b169f54d37ce541902c0ae5043759ef9d9b, `org-ql-completing-read` always appends the outline path to the headline, even if `org-ql-completing-read-reverse-paths` is set to nil.

For example, if you have a headline at level 3 and `org-ql-completing-read-reverse-paths` is nil, the formatted candidate will be

> Level 3 / Level 1 / Level 2

and if you have four levels, it will be

> Level 4 / Level 1 / Level 2 / Level 3

The expected output here is

> Level 1 / Level 2 / Level 3 / Level 4

and `org-ql-completing-read` behaved like this before.