docs: add ignore tag to isPaymentProcessor (#6410)

- Add ignore tags to `isPaymentProcessor` method and property
- Generate payment reference to move the associated section.

www/apps/docs/content/references/payment/classes/payment.AbstractPaymentProcessor.mdx

@@ -143,16 +143,6 @@ ___
 
 ## Methods
 
-### isPaymentProcessor
-
-#### Parameters
-
-<ParameterTypes parameters={[{"name":"object","type":"`any`","description":"","optional":false,"defaultValue":"","expandable":false,"children":[]}]}  sectionTitle="isPaymentProcessor"/>
-
-#### Returns
-
-<ParameterTypes parameters={[{"name":"boolean","type":"`boolean`","optional":false,"defaultValue":"","description":"","expandable":false,"children":[]}]}  sectionTitle="isPaymentProcessor"/>
-
 ### capturePayment
 
 This method is used to capture the payment amount of an order. This is typically triggered manually by the store operator from the admin.