refactor: add macro compatible interface for Interpolation

Author: SebastianM-C

src/Blocks/sources.jl

@@ -758,7 +758,7 @@ function Interpolation(interp_type, u, x, args...; name)
     Interpolation(itp; name)
 end
 
-function Interpolation(itp; name)
+function Interpolation(; itp, name)
     @parameters (interpolator::typeof(itp))(..) = itp
     @named input = RealInput()
     @named output = RealOutput()