interpreter: add missing arith ops

[compor]

Missing interpreter functions for arith operations (split off from #3784 CC @erick-xanadu):

@interpreter.register_impls
class ArithFunctionsExt(interpreters.arith.ArithFunctions):
    @interpreter.impl(UIToFPOp)
    def run_uitofpop(self, interpreter: interpreter.Interpreter, op: UIToFPOp, args: interpreter.PythonValues) -> interpreter.PythonValues:
        """Not really semantically correct, but good enough."""
        return (float(args[0]),)

    @interpreter.impl(arith.SIToFPOp)
    def run_sitofpop(self, interpreter: interpreter.Interpreter, op: arith.SIToFPOp, args: interpreter.PythonValues) -> interpreter.PythonValues:
        """Not really semantically correct, but good enough."""
        return (float(args[0]),)

    @interpreter.impl(FPToUIOp)
    def run_fptouiop(self, interpreter: interpreter.Interpreter, op: FPToUIOp, args: interpreter.PythonValues) -> interpreter.PythonValues:
        """Not really semantically correct, but good enough."""
        return (int(args[0]),)

    @interpreter.impl(arith.FPToSIOp)
    def run_fptosiop(self, interpreter: interpreter.Interpreter, op: arith.FPToSIOp, args: interpreter.PythonValues) -> interpreter.PythonValues:
        """Not really semantically correct, but good enough."""
        return (int(args[0]),)

    @interpreter.impl(arith.ExtUIOp)
    def run_extuiop(self, interpreter: interpreter.Interpreter, op: arith.ExtUIOp, args: interpreter.PythonValues) -> interpreter.PythonValues:
        """Not really semantically correct, but good enough."""
        return args

    @interpreter.impl(arith.TruncIOp)
    def run_trunciop(self, interpreter: interpreter.Interpreter, op: arith.TruncIOp, args: interpreter.PythonValues) -> interpreter.PythonValues:
        """Not really semantically correct, but good enough."""
        return args

    @interpreter.impl(arith.DivfOp)
    def run_divfop(self, interpreter: interpreter.Interpreter, op: arith.DivfOp, args: interpreter.PythonValues) -> interpreter.PythonValues:
        """Not really semantically correct, but good enough."""
        return (args[0] / args[1],)

    @interpreter.impl(arith.FloorDivSIOp)
    def run_floordivsiop(self, interpreter: interpreter.Interpreter, op: arith.FloorDivSIOp, args: interpreter.PythonValues) -> interpreter.PythonValues:
        """Not really semantically correct, but good enough."""
        return (args[0] // args[1],)