## Description
<ins>Problem</ins>
Form validation was not triggered when the child component was updated,
resulting in inconsistent data consistency.
<ins>Root cause</ins>
The `Form` component in
`app/client/src/widgets/JSONFormWidget/component/Form.tsx` did not
include the `trigger` function from the `methods` object, preventing
form validation from being triggered on child component updates.
<ins>Solution</ins>
This PR adds the `trigger` function from the `methods` object to the
`Form` component, ensuring form validation is triggered correctly when
the child component is updated.
* Adds unit tests for `Form` component as well
Fixes#28018
_or_
Fixes `Issue URL`
> [!WARNING]
> _If no issue exists, please create an issue first, and check with the
maintainers if the issue is valid._
## Automation
/ok-to-test tags="@tag.JSONForm"
### 🔍 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/11697880527>
> Commit: 1c38b05c04d9ed2c83d09a90d5fec720e30d4daf
> <a
href="https://internal.appsmith.com/app/cypress-dashboard/rundetails-65890b3c81d7400d08fa9ee5?branch=master&workflowId=11697880527&attempt=1"
target="_blank">Cypress dashboard</a>.
> Tags: `@tag.JSONForm`
> Spec:
> <hr>Wed, 06 Nov 2024 06:06:41 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
- **New Features**
- Enhanced form validation lifecycle management with the introduction of
the `useUnmountFieldValidation` hook for better handling of field
validation upon unmounting.
- Improved testability of the form component through the inclusion of
`data-testid` attributes for the submit and reset buttons.
- **Bug Fixes**
- Resolved edge cases in form validation, ensuring components function
correctly with changing props and handle empty schemas gracefully.
- **Tests**
- Introduced a comprehensive suite of unit tests for the `Form`
component, covering various scenarios including validation and
visibility management.
- Added tests for the new `useUnmountFieldValidation` hook to ensure
correct validation behavior during unmounting.
<!-- end of auto-generated comment: release notes by coderabbit.ai -->
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