SortClause\Location\Id SortClause uses alphabetical order, but should use numerical instead.

Steps to reproduce:
1. Execute a Query with ContentID SortClause enabled:

        $query->sortClauses = [new SortClause\Location\Id()];

Expected:
Content Items are sorted as follows:
1. LocationId = 1
2. LocationId = 2
3. LocationId = 3
...

Actual:
Content Items are sorted as follows:
1. LocationId = 100
2. LocationId = 1000
3. LocationId = 1001
4. LocationId = 1002
5. LocationId = 1003
...