[FEATURE] align the JSON deserialization errors into expected ErrorResponse format

### Feature Description

HyperSwitch uses an error format for responding back with the errors in the API. This error structure is uniform across different stages of the flow. For any deserialization errors in the API, error response with a different structure is returned.

Expected
```
{
    "error": {
        "error_type": "invalid_request",
        "message": "Json deserialize error: unknown variant `automatiac`, expected one of `automatic`, `manual`, `manual_multiple`, `scheduled` at line 5 column 34",
        "code": "IR_06"
    }
}
```

Actual
```
{
    "error": "Json deserialize error: unknown variant `automatiac`, expected one of `automatic`, `manual`, `manual_multiple`, `scheduled` at line 5 column 34"
}
```

### Possible Implementation

Update the `Display` implementation of `CustomJsonError`

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

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

### Have you read the Contributing Guidelines?

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

### Are you willing to submit a PR?

Yes, I am willing to submit a PR!
<think>
PR Context:
- Title: refactor: update API response for JSON deserialization errors
- Merged: 2024-11-21T22:26:21Z
- Files changed: 6 files
- Commits: 7 commits

Implementation approach:
## Type of Change
<!-- Put an `x` in the boxes that apply -->

- [ ] Bugfix
- [ ] New feature
- [ ] Enhancement
- [x] Refactoring
- [ ] Dependency updates
- [ ] Documentation
- [ ] CI/CD

## Description
Described in #6609

### Additional Changes

- [x] 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 
</think>

To implement this, you'll need to modify:


**Detailed Implementation:**


**Commit 1:** refactor: update API response for JSON deserialization errors (#6610)
Files to modify:


**crates/router/src/utils.rs**
  Modify existing code
{"issue_number": 6609, "pr_number": 6610, "commits_count": 1, "files_changed": 6, "response_length": 936, "file_count": 3, "needs_breakdown": false}