docs: support version in events reference (#12422)

* docs: support version in events reference

* remove changes in events output

* remove events emitted in comments

* remove customer updated event

* check for emitEventStep usage

* fixes

www/apps/api-reference/specs/store/openapi.full.yaml

@@ -857,7 +857,11 @@ paths:
           label: cURL
           source: |-
             curl -X POST '{backend_url}/store/carts' \
-            -H 'x-publishable-api-key: {your_publishable_api_key}'
+            -H 'Content-Type: application/json' \
+            -H 'x-publishable-api-key: {your_publishable_api_key}' \
+            --data-raw '{
+              "region_id": "reg_123"
+            }'
       tags:
         - Carts
       responses:
@@ -1079,15 +1083,6 @@ paths:
             ```
           description: Emitted when a cart's details are updated.
           deprecated: false
-        - name: cart.customer_updated
-          payload: |-
-            ```ts
-            {
-              id, // The ID of the cart
-            }
-            ```
-          description: Emitted when the customer in the cart is updated.
-          deprecated: false
         - name: cart.region_updated
           payload: |-
             ```ts