## Description
The `getTestPayloadFromCollectionData` extracts the `testPayload` from
passed `collectionData` and returns an empty string if no information is
present. This PR updates the function definition to allow different
default value based on the function call.


Fixes #37742 

## Automation

/test sanity

### 🔍 Cypress test results
<!-- This is an auto-generated comment: Cypress test results  -->
> [!TIP]
> 🟢 🟢 🟢 All cypress tests have passed! 🎉 🎉 🎉
> Workflow run:
<https://github.com/appsmithorg/appsmith/actions/runs/12572189037>
> Commit: 26ea6e2
> <a
href="https://internal.appsmith.com/app/cypress-dashboard/rundetails-65890b3c81d7400d08fa9ee5?branch=master&workflowId=12572189037&attempt=1"
target="_blank">Cypress dashboard</a>.
> Tags: `@tag.Sanity`
> Spec:
> <hr>Wed, 01 Jan 2025 16:34:44 UTC
<!-- end of auto-generated comment: Cypress test results  -->


## Communication
Should the DevRel and Marketing teams inform users about this change?
- [ ] Yes
- [x] No


<!-- This is an auto-generated comment: release notes by coderabbit.ai
-->

## Summary by CodeRabbit

- **Bug Fixes**
  - Enhanced function handling for undefined collection data
  - Improved key iteration in action execution utilities

- **Documentation**
  - Added JSDoc comment to clarify function behavior

<!-- end of auto-generated comment: release notes by coderabbit.ai -->