Issue:
Bug: [FEATURE]: [NMI] 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. 
- One might need to have exposure to api docs of the connector for which it is being implemented to decide what to fill in 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
- [ ] New feature
- [ ] Enhancement
- [x] Refactoring
- [ ] Dependency updates
- [ ] Documentation
- [ ] CI/CD

## Description
<!-- Describe your changes in detail -->


### Additional Changes

- [ ] This PR modifies the API contract
- [ ] This PR modifies the database schema
- [ ] This PR modifies application configuration/environment variables

<!--
Provide links to the files with corresponding changes.

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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## How did you test it?
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Did you write an integration/unit/API test to verify the code changes?
Or did you test this change manually (provide relevant screenshots)?
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Make any Payment for connector NMI and see that you are getting "reference_id" field in the payments response of hyperswitch. It should not be null.

## Checklist
<!-- Put an `x` in the boxes that apply -->

- [ ] I formatted the code `cargo +nightly fmt --all`
- [ ] I addressed lints thrown by `cargo clippy`
- [ ] I reviewed the submitted code
- [ ] I added unit tests for my changes where possible
- [ ] I added a [CHANGELOG](/CHANGELOG.md) entry if applicable


Testing:

Make any Payment for connector NMI and see that you are getting "reference_id" field in the payments response of hyperswitch. It should not be null.

Patch:
diff --git a/crates/router/src/connector/nmi/transformers.rs b/crates/router/src/connector/nmi/transformers.rs
index 5b486aae600..926f2c300d2 100644
--- a/crates/router/src/connector/nmi/transformers.rs
+++ b/crates/router/src/connector/nmi/transformers.rs
@@ -727,7 +727,7 @@ impl<T>
             Response::Approved => (
                 Ok(types::PaymentsResponseData::TransactionResponse {
                     resource_id: types::ResponseId::ConnectorTransactionId(
-                        item.response.transactionid.to_owned(),
+                        item.response.transactionid.clone(),
                     ),
                     redirection_data: None,
                     mandate_reference: None,
@@ -783,7 +783,7 @@ impl TryFrom<types::PaymentsResponseRouterData<StandardResponse>>
             Response::Approved => (
                 Ok(types::PaymentsResponseData::TransactionResponse {
                     resource_id: types::ResponseId::ConnectorTransactionId(
-                        item.response.transactionid.to_owned(),
+                        item.response.transactionid.clone(),
                     ),
                     redirection_data: None,
                     mandate_reference: None,
@@ -833,7 +833,7 @@ impl<T>
             Response::Approved => (
                 Ok(types::PaymentsResponseData::TransactionResponse {
                     resource_id: types::ResponseId::ConnectorTransactionId(
-                        item.response.transactionid.to_owned(),
+                        item.response.transactionid.clone(),
                     ),
                     redirection_data: None,
                     mandate_reference: None,