CLDC-3146 Update household validations (#2256)
* Separate the validations, remove irrelevant tests
* Remove relevant lettings 2023 validations from 24
* Update validations for 2024 lettings
* Separate sales validations
* Infer child uner 16 for sales
* Update sales validations
* Update tests
* Add validations to all relevant fields
* Add a 2023 context
* Undo some 2024 validations
* Remove another validation, update test names
* Remove child option hint
* Update person age hint
* Add ecstat buyer validation
* Add custom ecstat BU errors
* Skip working situation for child in sales
* Add child under 16 validation to 2024, do not reset ecstat
* Add soft validation columns
* Add partner under 16 soft validation
* Add multiple partners soft validations
* Remove child option for buyer 2
* Update CSVs
* Check hhmemb exists
* refactor
* Display child option for lettings
* Remove wrong tests
* More tests
kosiakkatrina
5907502f21