Allow list in Measure function

[juanboschero]

The current Measure function allows a single Qubit object i.e Measure(Qubit(1)). If one wants multiple measures, the user needs to specify:

Measure(Qubit(0))
Measure(Qubit(1))
Measure(Qubit(2))

1. Allow Measure to accept a list Measure([Qubit(0),Qubit(1),Qubit(2)])
2. Allow Measure to accept indices Measure(qubits = [0,1,2])
3. Allow measure all functionality when user does not specify a qubit, i.e Measure() performs a measure all

[rturrado]

Regarding point 3, we have to take care because the language doesn't accept that form.

I think we should keep consistency between the language and the CircuitBuilder.

[rturrado]

@elenbaasc @juanboschero I think we have to be more specific about this issue. I think the idea would be that, as well as you can use SGMQ (Single Gate Multiple Qubit) notation in the language, you should also be able to use it in the CircuitBuilder. But that doesn't mean that the Measure IR node can have multiple qubits. I think that would complicate the work on the rest of the compiler passes (imagine treating a measure q[1, 3, 5] as a single node instead of as 3 separate nodes, in terms of moving instructions around, dependencies with other instructions and so on...).