refactor: payment method management v2

[AdityaZampNew]

Type of Change

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

Description

Fixes #9315

Centralized the Fetch Payment Method List V2 endpoint by moving it from PaymentHelpersV2 into APIUtils.res under the V2 section.

How did you test it?

Checklist

• [x] I ran npm run re:build
• [x] I reviewed submitted code
• [ ] I added unit tests for my changes where possible

[semanticdiff-com[bot]]

Review changes with  

[AbhishekChorotiya]

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