## Description
> This PR fixes the cypress test for API multipart/form-data when the
FilePicker is selected as Base64
We have updated the cypress test to use `{{FilePicker1.files[0].data}}`
instead of `{{FilePicker1.files[0]}}`, this is because for base64 type
file picker we have to use `.data` property to make the file upload work
successfully.
Earlier, while the cypress test was passing with
{{FilePicker1.files[0]}} but the uploaded image was corrupted (please
check the screen recording below).
https://github.com/user-attachments/assets/c8cf07a1-db1c-4065-913a-00d544fe7e2bFixes#39354
## Automation
/ok-to-test tags="@tag.Datasource"
### 🔍 Cypress test results
<!-- This is an auto-generated comment: Cypress test results -->
> [!IMPORTANT]
> 🟣🟣🟣 Your tests are running.
> Tests running at:
<https://github.com/appsmithorg/appsmith/actions/runs/13408509228>
> Commit: 7b2360f4c5967d6082a442ed2eba15d6348dad6b
> Workflow: `PR Automation test suite`
> Tags: `@tag.Datasource`
> Spec: ``
> <hr>Wed, 19 Feb 2025 08:40:23 UTC
<!-- end of auto-generated comment: Cypress test results -->
## Communication
Should the DevRel and Marketing teams inform users about this change?
- [ ] Yes
- [ ] No
<!-- This is an auto-generated comment: release notes by coderabbit.ai
-->
## Summary by CodeRabbit
- **Tests**
- Updated file upload tests to properly validate file data extraction.
- Added a test scenario for adding new pages to enhance page management
verification.
- Revised page selection during tests for more accurate validation
outcomes.
<!-- end of auto-generated comment: release notes by coderabbit.ai -->
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