OvmfPkg: Realize EdkiiMemoryAcceptProtocol in TdxDxe

RFC: https://bugzilla.tianocore.org/show_bug.cgi?id=3937

Memory usage may exceed the amount accepted at the begining (SEC), TDVF
needs to accept memory dynamically when OUT_OF_RESOURCE occurs.

Another usage is in SetOrClearSharedBit. If a memory region is changed from
shared to private, it must be accepted again.

EdkiiMemoryAcceptProtocol is defined in MdePkg and is implementated /
installed in TdxDxe for Intel TDX memory acceptance.

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

OvmfPkg/TdxDxe/TdxDxe.inf

@@ -52,6 +52,7 @@
   gEfiAcpiTableProtocolGuid                        ## CONSUMES
   gEfiMpInitLibMpDepProtocolGuid
   gEfiMpInitLibUpDepProtocolGuid
+  gEdkiiMemoryAcceptProtocolGuid
 
 [Pcd]
   gUefiOvmfPkgTokenSpaceGuid.PcdPciIoBase
@@ -69,3 +70,4 @@
   gEfiMdeModulePkgTokenSpaceGuid.PcdTdxSharedBitMask
   gEfiMdeModulePkgTokenSpaceGuid.PcdSetNxForStack
   gEfiMdeModulePkgTokenSpaceGuid.PcdEmuVariableNvStoreReserved
+  gUefiOvmfPkgTokenSpaceGuid.PcdTdxAcceptPageSize