LF-4215 Write migration to add columns to product table and create update APIs

[kathyavini]

Description

These are the backend updates to the product table and routes

• n, p, k, and npk_unit columns added
• some minimal schema validation on the above
• cleaning up the completely unused POST endpoint on /product and adding a new PATCH
• permissions update: since adding product via the task routes (using the project.js middleware) has been available to all users, the same will now be done for POST and PATCH directly on the product routes
• following the pattern (which I really liked!) from LF-4152: Update add animals and batches APIs #3178, all validation on POST and PATCH content is in middleware (checkProductValidity.js)
• updated API tests

Jira link: https://lite-farm.atlassian.net/browse/LF-4215

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 added "MISSING" for all new language tags to languages I don't speak
• I have added the GNU General Public License to all new files

[SayakaOno]

Looks great! Left one minor comment :)

[SayakaOno]

Looks good!