Based on Jake's comment here #15247 (comment), we should refactor some Rust functions to use
Qubit/Clbit instead of ShareableQubit/ShareableClbit. Doing so will improve efficiency and API simplicity for C and Rust callers.

Candidate functions for this change are:

• DAGCircuit::from_circuit and DAGCircuit::from_circuit_data - converters::circuit_to_dag would have to map shareable bits to local bits
• DAGCircuit::compose - DAGCircuit::py_compose would have to map shareable bits to local bits