feat(core): implemented platform merchant account (#6882)

Co-authored-by: Narayanbhat166 <narayan.bhat@juspay.in>

crates/router/src/utils/user/sample_data.rs

@@ -275,6 +275,7 @@ pub async fn generate_sample_data(
             tax_details: None,
             skip_external_tax_calculation: None,
             psd2_sca_exemption_type: None,
+            platform_merchant_id: None,
         };
         let (connector_transaction_id, connector_transaction_data) =
             ConnectorTransactionId::form_id_and_data(attempt_id.clone());