WooCommerce Per Product Shipping / Shipping Per Product 2.7.6

* Fix - Declare class properties explicitly in WC_Shipping_Legacy_Per_Product to resolve PHP 8.2+ deprecated dynamic property warnings.

* Tweak - WooCommerce 10.6 Compatibility.

* Tweak - WooCommerce 10.5 Compatibility.

* Tweak - WordPress 6.9 and WooCommerce 10.4 Compatibility.

* Tweak - WooCommerce 10.3 Compatibility.

* Tweak - WooCommerce 10.2 Compatibility.

* Tweak - WooCommerce 10.1 Compatibility.

* Tweak - WooCommerce 10.0 Compatibility.

* Tweak - WooCommerce 9.9 Compatibility.

* Update Requires headers for WooCommerce compatibility.
* Update to ubuntu-latest to fix QIT tests.