Enhancement: log WC Subscription actions + general WC deletion actions

### Impacted plugin

None / Other

### What

The Jetpack Activity Log will note when an order was created/updated in WC but won't note when a subscription was created/updated nor when an order/product was deleted

### How

Similar to how a WC order is recorded in the Jetpack Activity Log, it could help a lot with debugging issues if order deletions were also recorded. Similar, if the logging that's available for WC orders would also be available for WC Subscriptions.

Start by locating the existing WooCommerce order activity logging and trace how order updates are recorded in the Jetpack Activity Log. Extend the investigation to subscription creation and updates, plus order and product deletions; done means these actions are recorded consistently for debugging.

Written by the indexing model from the issue text.