[Breaking] Bump minimum TypeScript version to 5.1.0 (#84384)
This PR bumps the minimum TS version required for Next.js to `5.1.0`,
which is the version that supports React Components that return a
promise via `JSX.ElementType`.
https://devblogs.microsoft.com/typescript/announcing-typescript-5-1/#decoupled-type-checking-between-jsx-elements-and-jsx-tag-types
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Co-authored-by: Sebastian "Sebbie" Silbermann <silbermann.sebastian@gmail.com>
