Conversion of ClExprOp should handle bitwise operations on more than 2 bits

[cqc-alec]

The following circuit runs successfully if submitted with QASM, but not if submitted with QIR:

from pytket.circuit import Circuit, ClBitVar, ClExpr, ClOp, WiredClExpr
from pytket.extensions.quantinuum import QuantinuumBackend, Language

c = Circuit(1).H(0)
ancilla_bits = c.add_c_register("a", 7)
syndrome_bits = c.add_c_register("s", 3)

expr = ClExpr(op=ClOp.BitXor, args=[ClBitVar(i) for i in range(4)])
wexpr = WiredClExpr(expr=expr, bit_posn={i: i for i in range(4)}, output_posn=[4])
c.add_clexpr(
    wexpr,
    [
        ancilla_bits[2],
        ancilla_bits[3],
        ancilla_bits[5],
        ancilla_bits[6],
        syndrome_bits[2],
    ],
)

b = QuantinuumBackend("H1-1E")
c1 = b.get_compiled_circuit(c)
h = b.process_circuit(c1, n_shots=10, language=Language.QASM)
r = b.get_result(h)
print(r.get_counts())

With QIR submission, we get an error from the QIR conversion:

  File "/home/alec/r/pytket-quantinuum/env/lib/python3.12/site-packages/pytket/qir/conversion/qirgenerator.py", line 832, in _get_ssa_from_clexpr_arg
    return True, _TK_CLEXPR_OP_TO_PYQIR[expr_op](self.module.builder)(
                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
TypeError: Builder.xor() takes 2 positional arguments but 4 were given