Support for mx operation in openqasm

[sacpis]

Fixes #2457

root@206a3d35e543:/workspaces/cuda-quantum# python3 docs/sphinx/examples/python/test.py 
// Code generated by NVIDIA's nvq++ compiler
OPENQASM 2.0;

include "qelib1.inc";

qreg var0[2];
h var0[0];
cx var0[0], var0[1];
creg var3[1];
h var0;
measure var0 -> var3[0];

Tests result

100% tests passed, 0 tests failed out of 810

Label Time Summary:
gpu_required    = 243.72 sec*proc (381 tests)

Total Test time (real) = 1000.05 sec

[github-actions]

CUDA Quantum Docs Bot: A preview of the documentation can be found here.