NetworkPkg: Fix SPD entry edit policy issue in IPSecConfig.

NetworkPkg: Fix SPD entry edit policy issue in IPSecConfig.

The current implementation doesn't handle the relationship
between SPD and SAD well, which may introduce some security
and connection issue after SPD updated.
For SPD entry edit policy, if one SPD entry is edited/updated,
the original SAs list should be discard. Current IPSecConfig
tool does not dealt properly with those rules.

Cc: Ye Ting <ting.ye@intel.com>
Cc: Fu Siyuan <siyuan.fu@intel.com>
Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Jiaxin Wu <jiaxin.wu@intel.com>
Reviewed-by: Ye Ting <ting.ye@intel.com>
Reviewed-by: Fu Siyuan <siyuan.fu@intel.com>
git-svn-id: https://svn.code.sf.net/p/edk2/code/trunk/edk2@19653 6f19259b-4bc3-4df7-8a09-765794883524