[statistics] Retrieve sex list with getSexList instead of hardcoded strings

[HachemJ]

Brief summary of changes

This PR replaces the hardcoded sex labels in the Statistics module with values retrieved from \Utility::getSexList(). The retrieved values are translated using dgettext within the utility function, eliminating the need for the corresponding hardcoded entries in the loris translation files.

Testing instructions (if applicable)

1. git checkout HachemJ/RetrieveSexListFromDbInStatistics
2. delete project/locale
3. copy raisinbread/locale into project/locale
4. run make dev (make sure it ran the msgfmt --use-fuzzy -o table.mo table.po commands)
5. Go to 'Reports' -> 'Statistics'
6. Switch the language to 'French'
7. Go to the 'Statistiques démographiques' tab
8. Confirm that the translated sex labels are displayed correctly throughout the Statistics module.

Link(s) to related issue(s)

• Resolves [statistics] Hardcoded sex list in statistics #10990 (Reference the issue this fixes, if any.)