MdeModulePkg/ReportStatusCodeRouter: Take HeaderSize into Consideration

MdeModulePkg/ReportStatusCodeRouter: Take HeaderSize into Consideration

REF:https://bugzilla.tianocore.org/show_bug.cgi?id=2669

Updates ReportDispatcher() to take the size in the HeaderSize field in
a EFI_STATUS_CODE_DATA element into account when walking the data buffer.
This size will cause the header size to differ from the compiled sizeof
header.

Cc: Hao A Wu <hao.a.wu@intel.com>
Cc: Jian J Wang <jian.j.wang@intel.com>
Cc: Kun Qin <Kun.Qin@microsoft.com>
Cc: Liming Gao <liming.gao@intel.com>
Signed-off-by: Michael Kubacki <michael.kubacki@microsoft.com>
Reviewed-by: Dandan Bi <dandan.bi@intel.com>