fix: Menu button widget height not changing on resizing (#25777)

## Description
Allows the menu button's height to change as the widget is resized.

#### PR fixes following issue(s)
Fixes #25738

#### 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
- [ ] 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
- [ ] My code follows the style guidelines of this project
- [ ] 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
- [ ] 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
- [ ] 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
- [x] 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

app/client/src/widgets/MenuButtonWidget/component/index.tsx

@@ -50,7 +50,7 @@ const PopoverStyles = createGlobalStyle<{
     margin-bottom: 8px !important;
     border-radius: ${({ borderRadius }) =>
       borderRadius >= THEMEING_TEXT_SIZES.lg ? `0.375rem` : borderRadius};
-    overflow-y: scroll;
+    overflow-y: auto;
     max-height: 384px;
   }
 
@@ -59,7 +59,7 @@ const PopoverStyles = createGlobalStyle<{
     border-radius: 0;
   }
 
-  & > .${Classes.POPOVER2_TARGET} {
+  .menu-button-popover-target {
     height: 100%;
   }
 
@@ -389,6 +389,7 @@ function MenuButtonComponent(props: MenuButtonComponentProps) {
         parentWidth={width - WidgetContainerDiff}
       />
       <Popover2
+        className="menu-button-popover-target"
         content={
           <PopoverContent
             backgroundColor={menuColor}