[data grid] Grouping by column of type singleSelect doesn't look up labels from valueOptions

[InNuceMSN]

Steps to reproduce

Steps:

1. Open this link to live example: https://codesandbox.io/p/sandbox/snowy-hooks-n6886h
2. Group by test using the column header menu

Current behavior

The grouped rows show the value for each group.

Expected behavior

The grouped rows should show the labels from the valueOptions just like when no grouping is active.

Context

We use singleSelect + valueOptions for fields which have a defined set of allowed values that are represented by technical keys. The labels are used to display human friendly, localized translations for the technical keys. We expect that the user never sees the technical keys directly.

Your environment

npx @mui/envinfo

  System:
    OS: Linux 6.9 Pop!_OS 22.04 LTS
  Binaries:
    Node: 20.18.0 - ~/.nvm/versions/node/v20.18.0/bin/node
    npm: 10.8.2 - ~/.nvm/versions/node/v20.18.0/bin/npm
    pnpm: Not Found
  Browsers:
    Chrome: Not Found
  npmPackages:
    @emotion/react: ^11.13.3 => 11.13.3 
    @emotion/styled: ^11.13.0 => 11.13.0 
    @mui/base:  5.0.0-beta.40 
    @mui/core-downloads-tracker:  5.16.7 
    @mui/icons-material: ^5.16.7 => 5.16.7 
    @mui/lab: ^5.0.0-alpha.134 => 5.0.0-alpha.173 
    @mui/material: ^5.16.7 => 5.16.7 
    @mui/private-theming:  6.1.1 
    @mui/styled-engine:  6.1.1 
    @mui/system:  6.1.1 
    @mui/types:  7.2.17 
    @mui/utils:  5.16.6 
    @mui/x-data-grid: ^7.3.2 => 7.20.0 
    @mui/x-data-grid-premium: ^7.22.2 => 7.20.0 
    @mui/x-data-grid-pro:  7.20.0 
    @mui/x-date-pickers: ^7.22.2 => 7.20.0 
    @mui/x-internals:  7.20.0 
    @mui/x-license: ^7.18.0 => 7.20.0 
    @mui/x-tree-view: ^7.22.1 => 7.20.0 
    @types/react: ^18.3.12 => 18.3.11 
    react: 18.3.1 => 18.3.1 
    react-dom: 18.3.1 => 18.3.1 
    typescript: ^5.6.3 => 5.6.3 

Browsers

Chrome: affected

Firefox: affected

others: not tested

Search keywords: grouping, singleSelect, DataGrid
Order ID: Order #97858

[github-actions]

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