Fix PHP 8.6 deprecation in hoa/consistency

[SanderMuller]

Running PHPStan on PHP 8.6 prints 24 deprecations before it does anything:

Deprecated: define(): Argument #3 ($case_insensitive) is ignored and treated as false since
declaration of case-insensitive constants is no longer supported, passing the argument
explicitly is unnecessary in vendor/hoa/consistency/Prelude.php on line 52

All 24 come from that one line. Prelude.php is in composer's autoload.files, so it runs on every
vendor/autoload.php include, and hoa/consistency arrives through hoa/compiler in require.

$define = function ($constantName, $constantValue, $case = false) {
    if (!defined($constantName)) {
        return define($constantName, $constantValue, $case);
    }

Dropping the third argument changes nothing. All 27 $define() call sites pass two arguments, so $case
is always false. I parsed them with a brace-aware scan rather than a grep, because one call spans three
lines.

Measured on 8.6.0beta2, through a real composer install so the patch goes through
cweagans/composer-patches:

	deprecations on autoload
8.6 before	24
8.6 after	0
8.5, either way	0

Same three-file shape as d36a97f and 44deb6b, the two 8.5 deprecation fixes. The constants come out
identical afterwards: SUCCEED, FAILED, WITH_COMPOSER, DS and PS all keep their values.

This is one piece of PHP 8.6 support, and it stands on its own. It is the Hoa problem you expected in
point 3.

[ondrejmirtes]

Thank you!