## Description
Ad unit tests for adding and moving building blocks saga.
Fixes#34146
## Automation
/ok-to-test tags="@tag.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/9494392536>
> Commit: c6b9b1b679f284458cc6500729408ddb015adb62
> Cypress dashboard url: <a
href="https://internal.appsmith.com/app/cypress-dashboard/rundetails-65890b3c81d7400d08fa9ee5?branch=master&workflowId=9494392536&attempt=1"
target="_blank">Click here!</a>
<!-- 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
- **Tests**
- Added comprehensive tests for adding and moving building blocks on the
canvas.
- Updated import paths for consistency in test files.
- Introduced new test suites for sagas handling building block
operations.
- **New Fixtures**
- Added mock data and constants for testing building block
functionalities.
<!-- end of auto-generated comment: release notes by coderabbit.ai -->
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