Fix sqlWalker::walkSimpleArithmeticExpression phpdoc

[VincentLanglet]

Compatibility with ORM 2 & 3 is not always easy with the different phpdoc/typehint on SQLWalker (and static analysis).

walkSimpleArithmeticExpression phpdoc only accepts SimpleArithmeticExpression on 2.x but in fact support a wilder type Node|string ; and the type was updated on 3.x branch.

I took the typehint from the 3.x branch

orm/src/Query/SqlWalker.php

Line 2127 in 2a250b5

public function walkSimpleArithmeticExpression(AST\Node|string $simpleArithmeticExpr): string

to update the phpdoc on 2.x branch.

This also fixes 7 baselines entries

[greg0ire]

Thanks for backporting this 👍

[greg0ire]

Thanks @VincentLanglet !