Compiler: abstract_eval_invoke_inst: type assert Expr

[nsajko]

Should make the code less vulnerable to invalidation.

[nsajko]

Prevents these invalidations (the method instance signatures seem identical, but that's what SnoopCompile gives me):

{   
    "method_instance": {
        "method": "abstract_eval_invoke_inst(interp::Compiler.AbstractInterpreter, inst::Compiler.Instruction, irsv::Compiler.IRInterpretationState) @ Compiler ../usr/share/julia/Compiler/src/ssair/irinterp.jl:34",      
        "method_instance": "MethodInstance for Compiler.abstract_eval_invoke_inst(::Compiler.AbstractInterpreter, ::Compiler.Instruction, ::Compiler.IRInterpretationState)"
    },
    "children": [
    ]
},
{
    "method_instance": {
        "method": "abstract_eval_invoke_inst(interp::Compiler.AbstractInterpreter, inst::Compiler.Instruction, irsv::Compiler.IRInterpretationState) @ Compiler ../usr/share/julia/Compiler/src/ssair/irinterp.jl:34",
        "method_instance": "MethodInstance for Compiler.abstract_eval_invoke_inst(::Compiler.NativeInterpreter, ::Compiler.Instruction, ::Compiler.IRInterpretationState)"
    },
    "children": [
    ]
}

The total invalidation count somehow doesn't change, staying at 739.

[nsajko]

The latest version of this PR additionally prevents these invalidations 🚀

{
    "method_instance": {
        "method": "isempty(r::StepRange) @ Base range.jl:685",
        "method_instance": "MethodInstance for isempty(::StepRange{Tuple{LineNumberNode, Expr}})"
    },
    "children": [
        {
            "method_instance": {
                "method": "iterate(r::OrdinalRange) @ Base range.jl:917",
                "method_instance": "MethodInstance for iterate(::OrdinalRange{Tuple{LineNumberNode, Expr}})"
            },
            "children": [
                {
                    "method_instance": {
                        "method": "Vector{T}(r::AbstractRange{T}) where T @ Base range.jl:1395",
                        "method_instance": "MethodInstance for Vector{Tuple{LineNumberNode, Expr}}(::AbstractRange{Tuple{LineNumberNode, Expr}})"
                    },
                    "children": [
                    ]
                }
            ]
        }
    ]
}

[topolarity]

Thanks @nsajko !