OvmfPkg: Add SecPeiCcProbeLib

OvmfPkg: Add SecPeiCcProbeLib

BZ: https://bugzilla.tianocore.org/show_bug.cgi?id=3974

SecPeiCcProbeLib is designed to probe the Confidential Computing guest
type in SEC/PEI phase. The CC guest type was set by each CC guest at
the beginning of boot up and saved in PcdOvmfWorkArea.

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>
Signed-off-by: Min Xu <min.m.xu@intel.com>
Acked-by: Gerd Hoffmann <kraxel@redhat.com>
Reviewed-by: Jiewen Yao <jiewen.yao@intel.com>