Fire HPOS bulk action hook for all custom bulk actions

[jorgeatorres]

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:

In HPOS, order bulk actions starting with mark_ (which include "Mark as Completed", "Mark as Cancelled", etc.) were being handled by our ListTable code internally, preventing 3rd parties from implementing similar actions as the bulk action hook wasn't being fired.

This PR makes it so any bulk action that isn't effectively handled by our own code can be implemented by the bulk action hook, even those starting with mark_ that don't correspond to a change to a known order status.

Closes #38558.

How to test the changes in this Pull Request:

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

With some copy/paste from the excellent instructions provided in #38558.

1. Check out trunk.
2. Enable HPOS by making sure that the "Enable the high performance order storage feature." is enabled in WC > Settings > Advanced > Features. Similarly, ensure that "Use the WooCommerce orders tables" is selected in WC > Settings > Advanced > Custom data stores.
3. Create a custom plugin or snippet with the following code:

   add_filter( "bulk_actions-woocommerce_page_wc-orders", function($actions) {
       return array_merge( $actions, [ 'mark_as_exported' => __( 'Mark as exported' ) ] );
   } );
   
   add_action( "handle_bulk_actions-woocommerce_page_wc-orders", function($redirect_to, $action, $ids) {
       if ($action === 'mark_as_exported') {
           die( 'Handling mark as exported' ); // <-- this never happens
       }
   }, 10, 3 );

4. Trigger the bulk action from the orders list table - select at least 1 order, then "Mark as exported" from bulk actions, and click Apply.
5. Confirm that nothing happens.
6. Check out this branch and repeat steps 2-4, but this time confirm that the custom hook is triggered and you see a "Handling mark as exported" on the screen.

[github-actions]

Hi @barryhughes,

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]

Hi @barryhughes,

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: ebd26bb

Test 🧪	Passed ✅	Failed 🚨	Broken 🚧	Skipped ⏭️	Unknown ❔	Total 📊	Duration ⏱️
API Tests	259	0	0	2	0	261	1m 0s
E2E Tests	195	0	0	10	0	205	13m 15s

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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.

[barryhughes]

Nice change 👌🏼