Issue:
Remove duplicated card number interface

### Feature Description

The CardNumber interface has a duplicated method with the same functionality.

### Possible Implementation

Remove one of the duplicated interfaces.

### 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!

Resolution:
<think>
PR Context:
- Title: refactor(cards,router): Remove duplicated card number interface
- Merged: 2024-05-16T13:41:57Z
- Files changed: 3 files
- Commits: 5 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
<!-- Describe your changes in detail -->
The CardNumber interface has a duplicated method with the same functionality. Removed one.
closes #4442
### Additional Changes

- [ ] This PR modifies the API contract
- [ ] This PR modifies the database schema
- [ ] This PR modifies app
</think>

To implement this, you'll need to modify:


**Detailed Implementation:**


**Commit 1:** refactor(cards,router): Remove duplicated card number interface (#4404)
Co-authored-by: Sanchith Heg
Files to modify:


**crates/api_models/src/payment_methods.rs**
  Modify existing code

**crates/cards/src/validate.rs**
  Remove:
    - function: pub::get_card_extended_bin

**crates/router/src/core/payments/helpers.rs**
  Modify existing code