Add OpSet 13 Registrations (#5426)
Register Sigmoid for OpSet13
Register OpSet 13 for Sum, Min, Max, Mean.
Add Erf OpSet 13 registration.
Register Clip for OpSet 13
Add Gemm/MatMul Opset 13 resigstartions
Signed-off-by: Dmitri Smirnov <dmitrism@microsoft.com>
