Respect locale setting to format order counts in admin orders list page

[gedex]

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:

Use number_format_i18n when outputting orders count

Closes #47372.

How to test the changes in this Pull Request:

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

1. Generate +1k orders, i.e. using wc-smooth-generator: wp wc generate orders 1001
2. See /wp-admin/admin.php?page=wc-orders and it should respect your locale settings, $wp_locale->number_format['decimal_point'] and $wp_locale->number_format['thousands_sep']
   

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

Respect locale settings when formatting order counts in admin orders page.

Comment

[github-actions]

Hi @jorgeatorres,

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]

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[jorgeatorres]

LGTM. Thank you @gedex!