OvmfPkg/PlatformPei: Build GuidHob for Tdx measurement

OvmfPkg/PlatformPei: Build GuidHob for Tdx measurement

BZ: https://bugzilla.tianocore.org/show_bug.cgi?id=4243

TdxHelperBuildGuidHobForTdxMeasurement is called in PlatformPei to build
GuidHob for Tdx measurement.

Cc: Erdem Aktas <erdemaktas@google.com>
Cc: James Bottomley <jejb@linux.ibm.com>
Cc: Jiewen Yao <jiewen.yao@intel.com>
Cc: Gerd Hoffmann <kraxel@redhat.com>
Cc: Tom Lendacky <thomas.lendacky@amd.com>
Cc: Michael Roth <michael.roth@amd.com>
Acked-by: Gerd Hoffmann <kraxel@redhat.com>
Reviewed-by: Jiewen Yao <jiewen.yao@intel.com>
Signed-off-by: Min Xu <min.m.xu@intel.com>