LF-5276: Save and return which crops or animals each expense is linked to models endpoints tests

[SayakaOno]

Description

• Add farmExpenseAnimalModel and farmExpenseCropVarietyModel
• Update farmExpense relations
• Add checkFarmExpense middleware for validation
  • Create crop variety model method cropVarietiesBelongToFarm
  • Extract common utility functions from checkSale
• Update farmExpenseController to handle allocation modifications
• Add tests
• (Irrelevant to the ticket) Update GET response to return [] instead of 404 when there are no expenses
  • Adjust saga

PATCH sample requests:

• Delete existing animal expense

  { "farm_expense_animal": [] }
  

  or

  { "farm_expense_animal": null }
  

  or add farm_expense_crop_variety

  { "farm_expense_crop_variety": [...] }
  

Jira link: https://lite-farm.atlassian.net/browse/LF-5276

Type of change

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• This change requires a documentation update

How Has This Been Tested?

• Passes test case
• UI components visually reviewed on desktop view
• UI components visually reviewed on mobile view
• Other (please explain)

Checklist:

• I have commented my code, particularly in hard-to-understand areas
• My changes generate no new warnings
• I have added tests that prove my fix is effective or that my feature works
• New and existing unit tests pass locally with my changes
• The precommit and linting ran successfully
• I have added or updated language tags for text that's part of the UI
• I have ordered translation keys alphabetically (optional: run pnpm i18n to help with this)
• I have added the GNU General Public License to all new files