[php-src] PR #23648: Fix GH-23644: crash on a constant-vs-constant empty array comparison

Pull Request: https://github.com/php/php-src/pull/23648 Author: lazerg When the optimizer proves a variable's value on a branch, it can substitute the constant in and leave a comparison whose two operands are both constants. ZEND_IS_IDENTICAL_EMPTY_ARRAY and ZEND_IS_NOT_IDENTICAL_EMPTY_ARRAY were the only handlers in that group declared without NO_CONST_CONST, unlike the base opcodes and the arithmetic handlers beside them, so the specialiser picked a variant that reads op1 as a variable slot. With a constant index there, the read lands outside the call frame and the process either crashes in zval_undefined_cv() or compares unrelated memory. Adding the marker to both handlers is the fix ndossche suggested on the issue. Fixes GH-23644