Issue: [BUG] handle refused responses when only one of `refusalCode` or `refusalDescription` is present for Worldpay

`refusalCode` and `refusalDescription` are mandatory fields whenever Worldpay refuses the transactions. There is a case where only `refusalDescription` is present. Handle these cases accordingly for `refused` scenarios.

Use `NO_ERROR_CODE` and `NO_ERROR_MESSAGE` in connector integration when either one or both of them are missing in the response.

Resolution: <think>
PR Context:
- Title: [BUG] handle refused responses when only one of refusalCode or refusa…
- Merged: None
- Files changed: 1 files
- Commits: 4 commits

Implementation approach:
fix(worldpay): handle refused responses when only refusalCode or refusalDescription is present

### Type of Change
- [x] Bugfix
- [ ] New feature
- [ ] Enhancement
- [ ] Refactoring
- [ ] Dependency updates
- [ ] Documentation
- [ ] CI/CD

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### Description
Some refused payment responses from Worldpay contain only `refusalCode` or only `refusalDescription`, but not both.  
Previously, the code assumed both fields would always be present, which led to `None` errors or blank erro
</think>

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