EXCEL export can export WYSIWYG

[afr751116]

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[] bug report => see 'Providing a Reproducible Scenario'
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    this.gridApi.exportDataAsExcel(this.getParams());
  getParams: () => ExcelExportParams = () => {    
    return {
      columnKeys: this.columnKeys,
      prependContent: this.getRowsPrependContent(), 
      author: '', 
      sheetName: this.tabTitle,
      fileName: this.tabTitle, 
  
       processCellCallback: params => {
       }}}

Try EXCEL export, how can the same effect as Csv export, export table display, without the need for separate processing
Problems caused by not handling manually:

1. If leading zeros exist, zeros are deleted from EXCEL
   2, similar to the following custom code does not take effect, exported the original code, rather than display the value
   valueFormatter: params => { return !params.node?.isRowPinned() && params.value ? this.lookupValue(this.departmentMappings, params.value) : null; }

Please tell us about your environment: WIN2019 Visual Studio Code

• AG Grid version: 30.2.0

• Browser: Google Chrome 123.0

• Language: [ TypeScript 4.3.5 | ES5]