[php-src] Issue #20966: UBSan: date_sun_info() triggers undefined behavior with PHP_INT_MAX arguments (NaN to long long cast)

Issue: https://github.com/php/php-src/issues/20966
Author: arshidkv12

### Description

The following code:

```php
<?php
var_dump(date_sun_info( 140, PHP_INT_MAX ,PHP_INT_MAX));
```

Resulted in this output:
```
var_dump(date_sun_info( 140, PHP_INT_MAX ,PHP_INT_MAX));
```

But I expected this output instead:
```
array(9) {
  'sunrise' =>
  int(0)
  'sunset' =>
  int(0)
  'transit' =>
  int(0)
  'civil_twilight_begin' =>
  int(0)
  'civil_twilight_end' =>
  int(0)
  'nautical_twilight_begin' =>
  int(0)
  'nautical_twilight_end' =>
  int(0)
  'astronomical_twilight_begin' =>
  int(0)
  'astronomical_twilight_end' =>
  int(0)
}
```


### PHP Version

```plain
PHP 8.6.0-dev (cli) (built: Jan 18 2026 17:43:31) (NTS DEBUG)
Copyright (c) The PHP Group
Zend Engine v4.6.0-dev, Copyright (c) Zend Technologies
    with Zend OPcache v8.6.0-dev, Copyright (c), by Zend Technologies
```

### Operating System

_No response_