Support `InjectNoise` annotations with `site='before'`

[aeddins-ibm]

site was added recently in Samplomatic: https://github.com/Qiskit/samplomatic/releases/tag/0.16.0

We can probably just xor the site attribute of each Box with the backwards argument of compute_bounds used here

qiskit-addon-slc/qiskit_addon_slc/bounds/commutator_bounds.py

Lines 186 to 190 in 65a35d6

	if backwards:
	# NOTE: we unroll the BoxOp immediately to allow gates contained within the box be
	# pruned by the LightCone pass
	for inst in circ_inst.operation.body[::-1]:
	_handle_circuit_instruction(inst)

and here

qiskit-addon-slc/qiskit_addon_slc/bounds/commutator_bounds.py

Lines 222 to 226 in 65a35d6

	if not backwards:
	# NOTE: we unroll the BoxOp immediately to allow gates contained within the box be
	# pruned by the LightCone pass
	for inst in circ_inst.operation.body[::-1]:
	_handle_circuit_instruction(inst)

We might be able to get rid of the backwards argument in favor of updating (or monkeypatching) the behavior of inverse() to toggle site between "before" and "after".