WooCommerce Catalog Visibility Options 3.3.7

* Update: WC and WP version compatibility.
* Update: Internal build scripts update to include version checks.
* Update: Load text domain during the init action to ensure it is available for all actions and filters.

Update: WP and WC version compatibility.

• WP and WC version compatibility.
• Move clearing of transients into a separate class so it can be queued and called during shutdown.
• Remove legacy code for WC 2.6 and older.
• Remove legacy code regarding extension updates and WC active check.
• General code cleanup.

* Update: WP and WC version compatibility.
* Update: PHP 8 compatibility.
* Update: HPOS compatibility.