[DataGridPro] Fix the return type of useGridApiRef for Pro and Premium packages on React < 19

[arminmeh]

Re-exported hook needs to be explicitly typed again to prevent type evaluation during build time to React.RefObject

Content of useGridApiRef.d.ts for the Pro package

before changes:

import { GridApiPro } from '../../models/gridApiPro';
export declare const useGridApiRef: () => import("react").RefObject<GridApiPro>;

after changes:

import { RefObject } from '@mui/x-internals/types';
import { GridApiCommon } from '@mui/x-data-grid';
import { GridApiPro } from '../../models/gridApiPro';
export declare const useGridApiRef: <Api extends GridApiCommon = GridApiPro>() => RefObject<Api>;

[mui-bot]

Deploy preview: https://deploy-preview-16328--material-ui-x.netlify.app/

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