Feat/csv reupload changes

[rithikb24]

Description

Handles Syncing of CSV Import for "Update existing products"

Type of change

• Add (non-breaking change which adds functionality)

Checklist

• ✅ I have commented my code, particularly in hard-to-understand areas, if any.
• ✅ I have confirmed that my changes do not introduce any new PHPCS warnings or errors.
• ✅ I have checked plugin debug logs that my changes do not introduce any new PHP warnings or FATAL errors.
• ✅ I followed general Pull Request best practices. Meta employees to follow this wiki.
• ✅ I have added tests (if necessary) and all the new and existing unit tests pass locally with my changes.
• ✅ I have completed dogfooding and QA testing, or I have conducted thorough due diligence to ensure that it does not break existing functionality.
• [] I have updated or requested update to plugin documentations (if necessary). Meta employees to follow this wiki.

Changelog entry

Handles Syncing of CSV Import for "Update existing products" to facebook commerce manager

Test Plan

• Import CSV with changes in existing products & check if synced in commerce manager.
• Check for any regression in CSV import flow for new products
• Should Handle Simple/Variable/Draft products as expected.

Screenshots

Please provide screenshots or snapshots of the system/state both before and after implementing the changes, if appropriate

Before

After

[facebook-github-bot]

@rithikb24 has imported this pull request. If you are a Meta employee, you can view this in D81488425.