Build BlueprintCircuit before inverse and compose

[georgios-ts]

Summary

Assert a call on _build method of a BlueprintCircuit if inverse or compose is called in order to populate internal _data field.

Details and comments

Previously, as reported on #5140, the following would fail since _data is still None.

var_form = EfficientSU2(2, entanglement="linear")
var_form.inverse()
---
raises TypeError
---
qc = QuantumCircuit(2)
qc.h([0, 1])

var_form.compose(qc, inplace=True)
---
raises TypeError
---

As with other attributes, before internal data of the circuit is accessed on inverse and compose functions, the _build method is called.

[kdk]

Thanks @georgios-ts ! Can you add a release note?