Issue:
Bug: [FEATURE]: [Rapyd] Use `connector_response_reference_id` as reference to merchant



### :memo: Feature Description

- Reference id are used to map transactions in the connector’s dashboard.
- Hyperswitch manages several reference ids, such as `payment_id`, `attempt_id`, and `connector_transaction_id` for a single transaction. 
- However, merchants may encounter uncertainty when determining which ID to utilize in the connector dashboard to identify the payment.

### :hammer: Possible Implementation

- When we receive a response from the connector for the payment, we deserialize it and populate the `response` field in RouterData. 
- For the `TransactionResponse` type, we must fill the `connector_response_reference_id` with a corresponding reference id for the merchant to identify the transaction. 
- Please refer to the Rapyd API documentation [here](https://docs.rapyd.net/en/create-payment.html). In the payment response, there is a field called `merchant_reference_id` (an optional field). This `merchant_reference_id` needs to be mapped to the `connector_response_reference_id`.
- You can check this PR for further reference https://github.com/juspay/hyperswitch/pull/1735

🔖 Note: All the changes needed should be contained within `hyperswitch/crates/router/src/connector/`


### :package: Have you spent some time checking if this feature request has been raised before?

- [X] I checked and didn't find a similar issue

### :package: Have you read the Contributing Guidelines?

- [X] I have read the [Contributing Guidelines](https://github.com/juspay/hyperswitch/blob/main/docs/CONTRIBUTING.md)

###  :sparkles: Are you willing to submit a PR?


Pull request description:
## Type of Change
<!-- Put an `x` in the boxes that apply -->

- [ ] Bugfix
- [x] New feature
- [ ] Enhancement
- [ ] Refactoring
- [ ] Dependency updates
- [ ] Documentation
- [ ] CI/CD

## Description
Add connector_response_reference_id support for Rapyd

- Used `merchant_reference_id` as the reference id, while implementing this!

Resolves #2346 

### Additional Changes

- [ ] This PR modifies the API contract
- [ ] This PR modifies the database schema
- [ ] This PR modifies application configuration/environment variables

<!--
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Following are the paths where you can find config files:
1. `config`
2. `crates/router/src/configs`
3. `loadtest/config`
-->


## Motivation and Context
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If it fixes an open issue, please link to the issue here.

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can focus on the implementation (unless it is an obvious bug or documentation fix
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## How did you test it?
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## Checklist
<!-- Put an `x` in the boxes that apply -->

- [x] I formatted the code `cargo +nightly fmt --all`
- [x] I addressed lints thrown by `cargo clippy`
- [ ] I reviewed the submitted code
- [ ] I added unit tests for my changes where possible


Testing:

Patch:
diff --git a/crates/router/src/connector/rapyd/transformers.rs b/crates/router/src/connector/rapyd/transformers.rs
index 044a64b413c..6689c5b46f4 100644
--- a/crates/router/src/connector/rapyd/transformers.rs
+++ b/crates/router/src/connector/rapyd/transformers.rs
@@ -274,6 +274,7 @@ pub struct ResponseData {
     pub country_code: Option<String>,
     pub captured: Option<bool>,
     pub transaction_id: String,
+    pub merchant_reference_id: Option<String>,
     pub paid: Option<bool>,
     pub failure_code: Option<String>,
     pub failure_message: Option<String>,
@@ -478,7 +479,9 @@ impl<F, T>
                                 mandate_reference: None,
                                 connector_metadata: None,
                                 network_txn_id: None,
-                                connector_response_reference_id: None,
+                                connector_response_reference_id: data
+                                    .merchant_reference_id
+                                    .to_owned(),
                                 incremental_authorization_allowed: None,
                                 charge_id: None,
                             }),