fix: UploadedFile::move() may return incorrect value

[kenjis]

Supersedes and closes #5290

Description

• if move_uploaded_file() returns false without warning, move() and hasMoved() returns true

https://www.php.net/manual/en/function.move-uploaded-file.php#refsect1-function.move-uploaded-file-returnvalues
Return Values ¶

Returns true on success.

If from is not a valid upload file, then no action will occur, and move_uploaded_file() will return false.

If from is a valid upload file, but cannot be moved for some reason, no action will occur, and move_uploaded_file() will return false. Additionally, a warning will be issued.

Checklist:

• Securely signed commits
• [] Component(s) with PHPDoc blocks, only if necessary or adds value
• Unit testing, with >80% coverage
• [] User guide updated
• Conforms to style guide