Use original method name in line table

[Keno]

I would prefer if the line table showed the original method name rather than the generated type name of the overlay pass. Would make backtraces much more readable.

julia> (@code_lowered pass(sin, 1))
CodeInfo(
1 ─       (getfield)(fargs, 1)
│   %2  = (getfield)(fargs, 2)
│   @ math.jl:1489 within `##SinTable#296`
│         xf = (#self#)(Base.Math.float, %2)
│   @ math.jl:1490 within `##SinTable#296`
│   %4  = (#self#)(Base.Math.:(===), %2, xf)
└──       goto #3 if not %4
2 ─ %6  = Base.Math.sin
│   %7  = (#self#)(Core.tuple, %2)
│   %8  = (#self#)(Base.Math.MethodError, %6, %7)
│         (#self#)(Base.Math.throw, %8)
└──       goto #3
    @ math.jl:1491 within `##SinTable#296`
3 ┄ %11 = (#self#)(Base.Math.sin, xf)
└──       return %11
)

julia> (@code_lowered pass(sin, 1)).linetable
3-element Vector{Any}:
 Core.LineInfoNode(Base.Math, Symbol("##SinTable#296"), Symbol("math.jl"), 1489, 0)
 Core.LineInfoNode(Base.Math, Symbol("##SinTable#296"), Symbol("math.jl"), 1490, 0)
 Core.LineInfoNode(Base.Math, Symbol("##SinTable#296"), Symbol("math.jl"), 1491, 0)

[Keno]

This might need some adjustments in base, I'm not entirely sure.