MdeModulePkg/Variable: Attribute combination should return EFI_UNSUPPORTED

MdeModulePkg/Variable: Attribute combination should return EFI_UNSUPPORTED

REF: https://bugzilla.tianocore.org/show_bug.cgi?id=4341

Commit 21320ef66989 broke some tests in the AuthVar_Conf test
in edk2-test.  There are 2 testcases that invoke SetVariable
with the following attribute value:

(EFI_VARIABLE_NON_VOLATILE | EFI_VARIABLE_AUTHENTICATED_WRITE_ACCESS)

EFI_VARIABLE_AUTHENTICATED_WRITE_ACCESS is deprecated and the UEFI spec
says this should return EFI_UNSUPPORTED.

Cc: Liming Gao <gaoliming@byosoft.com.cn>
Cc: Hao A Wu <hao.a.wu@intel.com>
Cc: Sunny Wang <Sunny.Wang@arm.com>
Signed-off-by: Stuart Yoder <stuart.yoder@arm.com>
Reviewed-by: Liming Gao <gaoliming@byosoft.com.cn>
Reviewed-by: Sunny Wang <sunny.wang@arm.com>