[core] Fix licensing model name

[oliviertassinari]

The initial goal was to finish the renaming of "licensing model" to "license model", where it got missed. At the same time I did:

• Align the license decode method with the source, to prepare for [x-license] Expose license decode logic #19024.

[mui-bot]

Deploy preview: https://deploy-preview-19025--material-ui-x.netlify.app/

Bundle size report

Bundle	Parsed Size	Gzip Size
@mui/x-data-grid	0B(0.00%)	0B(0.00%)
@mui/x-data-grid/DataGrid	0B(0.00%)	0B(0.00%)
@mui/x-data-grid-pro	🔺+298B(+0.06%)	🔺+80B(+0.06%)
@mui/x-data-grid-pro/DataGridPro	🔺+340B(+0.07%)	🔺+67B(+0.05%)
@mui/x-data-grid-premium	🔺+298B(+0.05%)	🔺+88B(+0.05%)
@mui/x-data-grid-premium/DataGridPremium	🔺+299B(+0.05%)	🔺+92B(+0.06%)
@mui/x-charts	0B(0.00%)	0B(0.00%)
@mui/x-charts-pro	🔺+298B(+0.08%)	🔺+85B(+0.07%)
@mui/x-date-pickers	0B(0.00%)	0B(0.00%)
@mui/x-date-pickers-pro	🔺+298B(+0.09%)	🔺+94B(+0.11%)
@mui/x-tree-view	0B(0.00%)	0B(0.00%)
@mui/x-tree-view-pro	🔺+298B(+0.37%)	🔺+90B(+0.36%)

Details of bundle changes

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