RedfishPkg/RedfishDiscoverDxe: EFI Redfish Discover Protocol

BZ#:2906
EDK2 EFI Redfish Discover Protocol implementation. Refer to UEFI
spec 2.9 section 31.1.

Signed-off-by: Abner Chang <abner.chang@hpe.com>
Cc: Nickle Wang <nickle.wang@hpe.com>
Cc: Jiaxin Wu <jiaxin.wu@intel.com>
Cc: Siyuan Fu <siyuan.fu@intel.com>
Cc: Fan Wang <fan.wang@intel.com>
Cc: Jiewen Yao <jiewen.yao@intel.com>
Reviewed-by: Nickle Wang <nickle.wang@hpe.com>