Kerberos: import KRB5_AD_WIN2K_PAC dissection from old non ASN.1 based dissector

Bug: 10539
Change-Id: I06d1179210bdcc63800ef9580bb274c714a77c6e
Reviewed-on: https://code.wireshark.org/review/5761
Petri-Dish: Pascal Quantin <pascal.quantin@gmail.com>
Tested-by: Petri Dish Buildbot <buildbot-no-reply@wireshark.org>
Reviewed-by: Pascal Quantin <pascal.quantin@gmail.com>