fix: Added height to new query button menu (#29729)

## Description

This PR adds a fixed height to the new query button in datasource config
page.

#### PR fixes following issue(s)
Fixes https://github.com/appsmithorg/appsmith/issues/29609


#### 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
- [ ] 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)
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>
## Checklist:
#### Dev activity
- [x] My code follows the style guidelines of this project
- [x] I have performed a self-review of my own code
- [ ] 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

- **Refactor**
- Updated the action button to have a conditional height based on the
number of pages for improved layout consistency.
<!-- end of auto-generated comment: release notes by coderabbit.ai -->

app/client/src/pages/Editor/DataSourceEditor/NewActionButton.tsx

@@ -101,7 +101,6 @@ function NewActionButton(props: NewActionButtonProps) {
     },
     [pages, createQueryAction, disabled, isLoading],
   );
-
   return (
     <Menu onOpenChange={handleOnInteraction} open={isPageSelectionOpen}>
       <MenuTrigger disabled={disabled}>
@@ -123,6 +122,7 @@ function NewActionButton(props: NewActionButtonProps) {
       <MenuContent
         align={"end"}
         data-testId={"t--page-selection"}
+        height={pages.length <= 4 ? "fit-content" : "186px"}
         side={"bottom"}
       >
         <Text className="pl-2" kind="heading-xs">{`Create a ${