Add Post-purchase note field to the Inventory tab

[mdperez86]

Submission Review Guidelines:

• I have followed the WooCommerce Contributing Guidelines and the WordPress Coding Standards.
• I have checked to ensure there aren't other open Pull Requests for the same update/change.
• I have reviewed my code for security best practices.
• Following the above guidelines will result in quick merges and clear and detailed feedback when appropriate.

Changes proposed in this Pull Request:

Closes #41740

How to test the changes in this Pull Request:

Using the WooCommerce Testing Instructions Guide, include your detailed testing instructions:

1. Make sure feature New product editor is enabled under /wp-admin/admin.php?page=wc-settings&tab=advanced&section=features
2. Go to Products > Add new from the left side menu.
3. Add a Name to the product
4. Go to the Inventory tab.
5. A new text area Post-purchase note should be shown

6. Add any note there and make sure the changes are persisted between refreshes.

Changelog entry

• Automatically create a changelog entry from the details below.

Significance

• Patch
• Minor
• Major

Type

• Fix - Fixes an existing bug
• Add - Adds functionality
• Update - Update existing functionality
• Dev - Development related task
• Tweak - A minor adjustment to the codebase
• Performance - Address performance issues
• Enhancement - Improvement to existing functionality

Message

Comment

[github-actions]

Hi , @woocommerce/mothra

Apart from reviewing the code changes, please make sure to review the testing instructions as well.

You can follow this guide to find out what good testing instructions should look like:
https://github.com/woocommerce/woocommerce/wiki/Writing-high-quality-testing-instructions

[github-actions]

Test Results Summary

Commit SHA: ff9ce0b

Test 🧪	Passed ✅	Failed 🚨	Broken 🚧	Skipped ⏭️	Unknown ❔	Total 📊	Duration ⏱️
API Tests	259	0	0	2	0	261	0m 38s
E2E Tests	344	0	0	7	0	351	7m 37s

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To view the full API test report, click here.
To view the full E2E test report, click here.
To view all test reports, visit the WooCommerce Test Reports Dashboard.

[octaedro]

Good job @mdperez86! This is testing well here and the code LGTM

I just have a sidenote. Should we add the post-purchase note to variations? If the answer is yes maybe we can tackle that in this PR.

[octaedro]

I just have a sidenote. Should we add the post-purchase note to variations? If the answer is yes maybe we can tackle that in this PR.

@mdperez86 In answer to my own question, variations retain the note added in this field (which, in the old editor, is located under the Advanced options). That means that if we want to add a specific note for a specific variation, we would need to change core. So, let's move forward with this PR and continue analyzing whether adding this feature is something we will want to pursue in the future or not.