Bump phpstan/phpstan from 2.1.40 to 2.2.2

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[jasonjoh]

@copilot fix this build issue

[Copilot]

@copilot fix this build issue

PHPStan 2.2.2 was reporting that the $progress closures in LargeFileUpload.php didn't match the expected type callable(array{int, int}): void. The arrow functions fn($prog) => print(...) had two issues:

1. Untyped $prog parameter (inferred as mixed)
2. Return value of 1 from print instead of void

Fixed both occurrences by converting to typed closures with an explicit array parameter type and void return type. Commit: the latest push to this branch.