NetworkPkg: UefiPxeBcDxe: SECURITY PATCH CVE-2023-45234 Unit Tests

REF:https://bugzilla.tianocore.org/show_bug.cgi?id=4539

Unit tests to that the bug..

Buffer overflow when processing DNS Servers option in a DHCPv6 Advertise
message

..has been patched

This contains tests for the following functions:
PxeBcHandleDhcp6Offer
PxeBcCacheDnsServerAddresses

Cc: Saloni Kasbekar <saloni.kasbekar@intel.com>
Cc: Zachary Clark-williams <zachary.clark-williams@intel.com>

Signed-off-by: Doug Flick [MSFT] <doug.edk2@gmail.com>
Reviewed-by: Saloni Kasbekar <saloni.kasbekar@intel.com>

NetworkPkg/UefiPxeBcDxe/GoogleTest/UefiPxeBcDxeGoogleTest.inf

@@ -0,0 +1,48 @@
+## @file
+# Unit test suite for the UefiPxeBcDxe using Google Test
+#
+# Copyright (c) Microsoft Corporation.<BR>
+# SPDX-License-Identifier: BSD-2-Clause-Patent
+##
+[Defines]
+INF_VERSION    = 0x00010005
+BASE_NAME      = UefiPxeBcDxeGoogleTest
+FILE_GUID      = 77D45C64-EC1E-4174-887B-886E89FD1EDF
+MODULE_TYPE    = HOST_APPLICATION
+VERSION_STRING = 1.0
+
+#
+# The following information is for reference only and not required by the build tools.
+#
+#  VALID_ARCHITECTURES           = IA32 X64
+#
+
+[Sources]
+  UefiPxeBcDxeGoogleTest.cpp
+  PxeBcDhcp6GoogleTest.cpp
+  PxeBcDhcp6GoogleTest.h
+  ../PxeBcDhcp6.c
+  ../PxeBcSupport.c
+
+[Packages]
+  MdePkg/MdePkg.dec
+  MdeModulePkg/MdeModulePkg.dec
+  UnitTestFrameworkPkg/UnitTestFrameworkPkg.dec
+  NetworkPkg/NetworkPkg.dec
+
+[LibraryClasses]
+  GoogleTestLib
+  DebugLib
+  NetLib
+  PcdLib
+
+[Protocols]
+  gEfiDhcp6ServiceBindingProtocolGuid
+  gEfiDns6ServiceBindingProtocolGuid
+  gEfiDns6ProtocolGuid
+
+[Pcd]
+  gEfiNetworkPkgTokenSpaceGuid.PcdDhcp6UidType
+
+[Guids]
+  gZeroGuid