[PATCH v3 0/2] MR8285: kernelbase: Support extended paths in GetFinalPathNameByHandleW

[Michael Stopa (＠stomy)]

All unicode API functions are supposed to support paths longer than `MAX_PATH` if prepended with the extended-path prefix `\\?\`. As of writing this function in particular doesn't.

This is causing problems with Unreal Engine shader preprocessing when running under Wine.

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  v3: kernelbase: Support extended paths in GetFinalPathNameByHandleW
      kernelbase/tests: Test GetFinalPathNameByHandleW for long path support
 
https://gitlab.winehq.org/wine/wine/-/merge_requests/8285