Stdlib: wordwrap() width accepts float truncation and numeric strings (#4212)

[PurHur]

Summary

• wordwrap() argument Php stdlib specs implementation #2 ($width) now uses VmMath::parseIntBuiltinArg / JitIntdiv::lowerIntBuiltinArg (php-src ext/standard/string.c Z_PARAM_LONG) instead of rejecting non-int operands with LogicException.
• JIT compile-time constant folding in JitWordwrap handles float and numeric-string widths.
• Adds compliance PHPT (VM + JIT), AOT fixture, and maintainer repro.

Closes #4212

php-src reference

• ext/standard/string.c — PHP_FUNCTION(wordwrap) / php_wordwrap

Verification

./script/docker-exec.sh -- bash -lc 'source script/php-env.sh
php test/repro-maintainer/wordwrap_width_coerce.php
php bin/vm.php test/repro-maintainer/wordwrap_width_coerce.php
php bin/jit.php test/repro-maintainer/wordwrap_width_coerce.php
php bin/compile.php -l test/repro-maintainer/wordwrap_width_coerce.php
vendor/bin/phpunit --filter wordwrap_width
vendor/bin/phpunit --filter wordwrap_width_coerce test/aot/AotTest.php
'

Output (all three runtimes match Zend):

hello
hello
world
hello
world
TypeError: wordwrap(): Argument #2 ($width) must be of type int, string given
TypeError: wordwrap(): Argument #2 ($width) must be of type int, array given

PHPUnit: OK (5 tests, 9 assertions) for --filter wordwrap_width; AOT fixture OK (1 test, 5 assertions).

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