## Description
This PR fixes two of the UI issues in start with data flow:
[too much white space in datasource form, can’t see
CTAs](https://www.notion.so/appsmith/too-much-white-space-in-datasource-form-can-t-see-CTAs-fd05d99a4fc04a9da273226477d41426?pvs=4)
[When there is a small space then the form is itself scrolling instead
of the full
screen.](https://www.notion.so/appsmith/When-there-is-a-small-space-then-the-form-is-itself-scrolling-instead-of-the-full-screen-76f4871977d34c3fb2dfc23ddcf57944?pvs=4)
#### PR fixes following issue(s)
Fixes#29254
#### Media
> A video or a GIF is preferred. when using Loom, don’t embed because it
looks like it’s a GIF. instead, just link to the video
>
>
#### Type of change
- Bug fix (non-breaking change which fixes an issue)
>
>
>
## Testing
>
#### How Has This Been Tested?
> Please describe the tests that you ran to verify your changes. Also
list any relevant details for your test configuration.
> Delete anything that is not relevant
- [x] Manual
- [ ] JUnit
- [ ] Jest
- [ ] Cypress
>
>
#### Test Plan
> Add Testsmith test cases links that relate to this PR
>
>
#### Issues raised during DP testing
> Link issues raised during DP testing for better visiblity and tracking
(copy link from comments dropped on this PR)
>
>
>
## Checklist:
#### Dev activity
- [x] My code follows the style guidelines of this project
- [x] I have performed a self-review of my own code
- [x] I have commented my code, particularly in hard-to-understand areas
- [ ] I have made corresponding changes to the documentation
- [x] My changes generate no new warnings
- [ ] I have added tests that prove my fix is effective or that my
feature works
- [ ] New and existing unit tests pass locally with my changes
- [x] PR is being merged under a feature flag
#### QA activity:
- [ ] [Speedbreak
features](https://github.com/appsmithorg/TestSmith/wiki/Guidelines-for-test-plans#speedbreakers-)
have been covered
- [ ] Test plan covers all impacted features and [areas of
interest](https://github.com/appsmithorg/TestSmith/wiki/Guidelines-for-test-plans#areas-of-interest-)
- [ ] Test plan has been peer reviewed by project stakeholders and other
QA members
- [ ] Manually tested functionality on DP
- [ ] We had an implementation alignment call with stakeholders post QA
Round 2
- [ ] Cypress test cases have been added and approved by SDET/manual QA
- [ ] Added `Test Plan Approved` label after Cypress tests were reviewed
- [ ] Added `Test Plan Approved` label after JUnit tests were reviewed
<!-- This is an auto-generated comment: release notes by coderabbit.ai
-->
## Summary by CodeRabbit
- **New Features**
- Introduced an onboarding flow for the DataSource Editor, enhancing the
user experience for new users.
- **Style**
- Updated the DataSource Editor interface to dynamically adjust its
layout during the onboarding process.
<!-- end of auto-generated comment: release notes by coderabbit.ai -->
Co-authored-by: “sneha122” <“sneha@appsmith.com”>
Co-authored-by: Aman Agarwal <aman@appsmith.com>
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