fix(carousel): fix variables propagation (#16084)

#### Pull request checklist

- [x] Addresses an existing issue: Fixes #15992
- [ ] Include a change request file using `$ yarn change`

#### Description of changes

`variables` weren't being passed down to paddles, this is fixed by passing it to `overrideProps`

#### Focus areas to test

(optional)

packages/fluentui/CHANGELOG.md

@@ -57,6 +57,8 @@ This project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.htm
 - Fix shorthand `id` prop not being passed to control in `FormField` component @assuncaocharles ([#16003](https://github.com/microsoft/fluentui/pull/16003))
 - Fix outdated `onChange` call in `RadioGroupItem` @assuncaocharles ([#15997](https://github.com/microsoft/fluentui/pull/15997))
 - Fix `Dropdown` to not break new lines for button trigger after listbox was introduced wrapping selected items @assuncaocharles ([#15898](https://github.com/microsoft/fluentui/pull/15898))
+- Fix `Input` content overlaping with `Icon` @assuncaocharles ([#16083](https://github.com/microsoft/fluentui/pull/16083))
+- Fix `variables` not being propagated in `Carousel` @assuncaocharles ([#16084](https://github.com/microsoft/fluentui/pull/16084))
 
 ### Features
 - `Tree`: added `useTree` hook @yuanboxue-amber ([#15831](https://github.com/microsoft/fluentui/pull/15831))

packages/fluentui/react-northstar/src/components/Carousel/Carousel.tsx

@@ -30,6 +30,7 @@ import {
   useTelemetry,
   useUnhandledProps,
   useStateManager,
+  mergeVariablesOverrides,
 } from '@fluentui/react-bindings';
 import { createCarouselManager, CarouselState, CarouselActions } from '@fluentui/state';
 
@@ -364,6 +365,7 @@ export const Carousel: ComponentWithAs<'div', CarouselProps> &
   };
 
   const handlePaddleOverrides = (predefinedProps: CarouselPaddleProps, paddleName: string) => ({
+    variables: mergeVariablesOverrides(variables, predefinedProps.variables),
     onClick: (e: React.SyntheticEvent, paddleProps: CarouselPaddleProps) => {
       _.invoke(predefinedProps, 'onClick', e, paddleProps);
       if (paddleName === 'paddleNext') {