Fix f_404 and f_405

[yosuke-wolfssl]

This PR is intended to fix the following things:

• Change SetupUserTokenWin() to use DomainName.Length for DomainName.MaximumLength instead of UserPrincipalName.Length.
• Change CheckPasswordWIN() to calculate usrWSz as wide character length properly.

[Copilot]

Pull request overview

This PR fixes two Windows-specific issues in wolfsshd authentication: correcting size calculations for username wide-string conversion and fixing an incorrect UNICODE_STRING.MaximumLength assignment when constructing S4U logon data for LSA.

Changes:

• Fix CheckPasswordWIN() to treat usrWSz as a wide-character element count (not bytes) and adjust allocation/conversion sizes accordingly.
• Fix SetupUserTokenWin() to set DomainName.MaximumLength based on DomainName.Length (not UserPrincipalName.Length).

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