fix: Correct qubit count for MCM with noncontiguous qubits

[speller26]

Issue #, if available:

Description of changes:

Testing done:

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[yitchen-tim]

from braket.devices import LocalSimulator
from braket.ir.openqasm import Program

qasm = """
OPENQASM 3.0;
qubit q;

x q[0];
measure q[0];
x q[0];
measure q[0];
x q[0];
measure q[0];
"""

program = Program(source=qasm)

res0 = LocalSimulator().run(program, shots=100).result()
print(res0.measurement_counts)

Expected "101" but got all counts as "111"

[speller26]

We don't have output variables, so only every subsequent measurement overwrites the previous value. I'll work on this in a subsequent PR