Add rust representation of control flow op

[mtreinish]

Right now the ControlFlowOp class and it's subclasses for each type of control flow Qiskit supports (for, while, if/else, switch) are defined solely in Python. We should move the definition of these to rust so the python side is creating and interacting with a rust owned structure. This will enable us to deal with control flow, including to recurse into the operations in rust without needing python.

This weakly depends on #12966 as we'll need to figure out the best way to expand PackedOperation to support this and the pattern we establish in #12966 will inform this.