Fix #11569: PHPStan does not handle ksort

[phpstan-bot]

Summary

PHPStan did not reorder constant array keys after ksort()/krsort() calls. This meant that subsequent operations like array_values() returned values in the wrong order, causing false positives when the values were used with array_combine().

Changes

• Split ksort and krsort out of the general "sort without preserving list" handler in src/Analyser/NodeScopeResolver.php
• Added new getArrayKsortFunctionType() method that sorts ConstantArrayType entries by their key values using PHP's natural comparison (<=>)
• Correctly computes isList for sorted arrays: ksort on a list preserves list status (keys already sequential), krsort on a list correctly marks it as non-list
• Handles optional keys by remapping their indices after sorting
• Updated existing test expectations in tests/PHPStan/Analyser/nsrt/bug-10627.php to match correct behavior

Root cause

The getArraySortDoNotPreserveListFunctionType() method handled all non-list-preserving sort functions identically, simply recreating the ConstantArrayType with the same key/value order. For ksort/krsort, the key order is deterministic and should be reflected in the type. Without reordering, array_values() after ksort() would produce values in the original insertion order rather than the key-sorted order, leading to incorrect types downstream.

Test

Added tests/PHPStan/Analyser/nsrt/bug-11569.php testing:

• ksort on array{name: string, age: int} produces array{age: int, name: string} (alphabetical key order)
• krsort reverses key order
• array_values() after ksort returns values in the correct sorted order
• array_combine() with sorted values produces the correct result type
• Integer key arrays: ksort preserves order, krsort reverses
• String key arrays: both ksort and krsort sort correctly

Fixes phpstan/phpstan#11569