Include Array data to Expression

[Doomsk]

Besides Numeric (int, float, complex) and Expression, there should be an Array data for a few parameters, such as detuning and amplitude, to be able to use for NativeDrive or other primitives that require interpolation/datapoints.

ping @jpmoutinho @pimvenderbosch

[jpmoutinho]

Like discussed today there are already certain array functionalities in Expressions, although limited or needing some fine-tuning. I will update this comment when I come across things that need fixing:

Currently the size attribute is not updated for an expression that is still an array, e.g.:

expr = array_parameter("b", size = 5)
expr.attrs
> {'size': 5}  # all good

expr = 2.0 * array_parameter("b", size = 5)
expr.attrs
> {}  # size is now missing