[NO MERGE] test integration of qiskit with my test stack #14785
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With this modification, qasm3 super extends annotations in measurements, which are only supported by mutable `Measure` subclass.
```python
from qiskit import qasm3
from qiskit.circuit import annotation, QuantumCircuit, Measure
class MidCircMeasurementAnnotation(annotation.Annotation):
namespace = "qcf.mid_circ_measure"
class MidCircuitMeasure(Measure):
"""A custom specialized measurement."""
def __init__(self, annotation_str=None):
super().__init__(label=annotation_str)
a = MidCircMeasurementAnnotation()
a.namespace += "." + str(annotation_str)
self.annotations = [a]
```
The annotation needs a serializers, but it is not used because, as defined above, does not have parameters:
```python
class Serializer(annotation.OpenQASM3Serializer):
def dump(self, annotation):
pass
def load(self, namespace, payload):
pass
```
It can be used in this way:
```python
measure_2 = MidCircuitMeasure("measure_2")
measure_3 = MidCircuitMeasure("measure_3")
circ = QuantumCircuit(2, 2)
circ.append(measure_2, [0], [0])
circ.append(measure_3, [1], [0])
circ.append(measure_2, [0], [1])
circ.measure_all()
handlers = {"qcf": Serializer()}
print(qasm3.dumps(circ, annotation_handlers=handlers))
```
```C
OPENQASM 3.0;
include "stdgates.inc";
bit[2] c;
bit[2] meas;
qubit[2] q;
@qcf.mid_circ_measure.measure_2AAA
c[0] = measure q[0];
@qcf.mid_circ_measure.measure_3
c[0] = measure q[1];
@qcf.mid_circ_measure.measure_2AAA
c[1] = measure q[0];
barrier q[0], q[1];
meas[0] = measure q[0];
meas[1] = measure q[1];
```
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