[material-ui][Grid] Revert wrap deprecation (#42363)

[DiegoAndai]

Revert Grid wrap prop deprecation (#42363). Originally planned to be deprecated for the system prop flexWrap (https://github.com/mui/material-ui/issues/41250), but as that's now removed, it's worth it keeping the wrap prop (https://github.com/mui/pigment-css/pull/144#issuecomment-2185619000). This prop is also available on the Pigment Grid (https://github.com/mui/pigment-css/pull/159).

[mui-bot]

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