[material-ui] Change React.ReactElement<any> to React.ReactElement<unknown>

[sai6855]

Part of: https://github.com/mui/material-ui/issues/42380

follow up on https://github.com/mui/material-ui/pull/43358#pullrequestreview-2251397082

As of now, there are 7 instances of React.ReactElement left to be migrated except for base/, joy/ folders. Remaining chnages are not straight forward changes from any to unknown, as those requires few more type changes. i'll open a new PR for left over instances

• [x] I have followed (at least) the PR section of the contributing guide.

[mui-bot]

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[sai6855]

@DiegoAndai updated PR based on https://github.com/mui/material-ui/pull/43402#discussion_r1785562540 https://github.com/mui/material-ui/pull/43402#discussion_r1785558022 it is ready for final review

[DiegoAndai]

Thanks @sai6855!