Describe the bug

WCS_Admin_Meta_Boxes->enqueue_styles_scripts() attempts to load a subscription on any admin page that has a global $post at the time of admin_enqueue_scripts executing, i.e. /wp-admin/edit.php or /wp-admin/edit.php?post_type=aw_workflow.

This doesn't appear to break anything specific as the default datastores do not return a data object, but does cause an extra query to be run on those pages when HPOS is enabled. I have not yet tested what occurs if HPOS is not enabled.

To Reproduce

1. Enable HPOS.
2. Install a query monitor.
3. Visit admin posts listing page.
4. Search for a query to get the order type of the first post of the listing page even though it is a post. E.g. SELECT id, type FROM wp_wc_orders WHERE id IN ( 1103554 )

Expected behavior

It isn't expected that the WCS_Admin_Meta_Boxes would attempt to load a non-subscription.

It is expected that the styles wouldn't attempt to be loaded for the metabox unless the metabox is actually added to the screen. Or at least verify that this is a screen that needs the subscription before attempting to load the subscription of the global $post.

Product impact

This is a core issue that affects both extensions, but the impact is minor.

• Does this issue affect WooCommerce Subscriptions? yes/no/tbc, add issue ref
• Does this issue affect WooCommerce Payments? yes/no/tbc, add issue ref