refactor: use register symbolic for interpolation objects

[sathvikbhagavan]

fixes: #317

It was missing a dispatch:

(interp::AbstractInterpolation)(t::BasicSymbolic) = SymbolicUtils.term(interp, t)

But then all of them can be combined to just use register_symbolic as it does the same thing:

ulia> @macroexpand @register_symbolic A(t)
quote
    begin
        #= /home/sathvikbhagavan/.julia/packages/Symbolics/f5Y9e/src/wrapper-types.jl:151 =#
        function A_10851946841911346439(nothing, t)
            #= /home/sathvikbhagavan/.julia/packages/Symbolics/f5Y9e/src/wrapper-types.jl:124 =#
            #= /home/sathvikbhagavan/.julia/packages/Symbolics/f5Y9e/src/wrapper-types.jl:125 =#
            begin
                #= /home/sathvikbhagavan/.julia/packages/Symbolics/f5Y9e/src/register.jl:32 =#
                #= /home/sathvikbhagavan/.julia/packages/Symbolics/f5Y9e/src/register.jl:33 =#
                args = [t]
                #= /home/sathvikbhagavan/.julia/packages/Symbolics/f5Y9e/src/register.jl:34 =#
                unwrapped_args = map(Symbolics.unwrap, args)
                #= /home/sathvikbhagavan/.julia/packages/Symbolics/f5Y9e/src/register.jl:35 =#
                res = if !(any((x->begin
                                        #= /home/sathvikbhagavan/.julia/packages/Symbolics/f5Y9e/src/register.jl:35 =#
                                        (TermInterface.issym)(x) || (TermInterface.iscall)(x)
                                    end), unwrapped_args))
                        #= /home/sathvikbhagavan/.julia/packages/Symbolics/f5Y9e/src/register.jl:36 =#
                        A(unwrapped_args...)
                    else
                        #= /home/sathvikbhagavan/.julia/packages/Symbolics/f5Y9e/src/register.jl:38 =#
                        (SymbolicUtils.Term){Real}(A, unwrapped_args)
                    end
                #= /home/sathvikbhagavan/.julia/packages/Symbolics/f5Y9e/src/register.jl:40 =#
                if typeof.(args) == typeof.(unwrapped_args)
                    #= /home/sathvikbhagavan/.julia/packages/Symbolics/f5Y9e/src/register.jl:41 =#
                    return res
                else
                    #= /home/sathvikbhagavan/.julia/packages/Symbolics/f5Y9e/src/register.jl:43 =#
                    return (Symbolics.wrap)(res)
                end
            end
        end
        #= /home/sathvikbhagavan/.julia/packages/Symbolics/f5Y9e/src/wrapper-types.jl:152 =#
        function A(t::Symbolics.SymbolicUtils.Symbolic{<:Real})
            #= /home/sathvikbhagavan/.julia/packages/Symbolics/f5Y9e/src/wrapper-types.jl:140 =#
            #= /home/sathvikbhagavan/.julia/packages/Symbolics/f5Y9e/src/wrapper-types.jl:141 =#
            if any(Symbolics.iswrapped, (t,))
                #= /home/sathvikbhagavan/.julia/packages/Symbolics/f5Y9e/src/wrapper-types.jl:134 =#
                (Symbolics.wrap)(A_10851946841911346439(nothing, (Symbolics.unwrap)(t)))
            else
                #= /home/sathvikbhagavan/.julia/packages/Symbolics/f5Y9e/src/wrapper-types.jl:136 =#
                A_10851946841911346439(nothing, t)
            end
        end
        function A(t::Num)
            #= /home/sathvikbhagavan/.julia/packages/Symbolics/f5Y9e/src/wrapper-types.jl:140 =#
            #= /home/sathvikbhagavan/.julia/packages/Symbolics/f5Y9e/src/wrapper-types.jl:141 =#
            if any(Symbolics.iswrapped, (t,))
                #= /home/sathvikbhagavan/.julia/packages/Symbolics/f5Y9e/src/wrapper-types.jl:134 =#
                (Symbolics.wrap)(A_10851946841911346439(nothing, (Symbolics.unwrap)(t)))
            else
                #= /home/sathvikbhagavan/.julia/packages/Symbolics/f5Y9e/src/wrapper-types.jl:136 =#
                A_10851946841911346439(nothing, t)
            end
        end
    end
    #= /home/sathvikbhagavan/.julia/packages/Symbolics/f5Y9e/src/register.jl:48 =#
    (::(typeof)(SymbolicUtils.promote_symtype))(::(typeof)(A), args...) = begin
            #= /home/sathvikbhagavan/.julia/packages/Symbolics/f5Y9e/src/register.jl:48 =#
            Real
        end
end