Unify style across circuit visualizers

The circuit visualizers are currently configurable via some kwargs to the circuit.draw() function, but also the mpl drawer accepts a style dict. This request is to unify the interface so that the important ones are accessed via the kwargs. The mpl style should probably just be trimmed down to some coloring schemes.

Here’s a rundown of the status of each:

• ‘cregbundle’: this is a useful option that is only available via the mpl style, and I’d like it to be available in all via a kwarg in draw(). PR #4274

• ‘line_length’ kwarg: this currently only works for text. The mpl accepts a ‘fold’ key in its style. These should be consolidated into a fold kwarg (i think fold is better than line_length). PR #3108

• ‘scale’ kwarg: works well for mpl and latex. Does not work for text, which is probably expected. But docstring should reflect that. PR #4274

• ~‘filename’ kwarg: file saving does not work for text. It should.~ Could not reproduce.

• ‘plot_barriers’ kwarg: this works well. The mpl style key ‘plotbarriers’ is redundant and should be removed. PR #3105

[maxKenngott]

I’d like to give this one a shot if possible.

[1ucian0]

I used a flight to attack some of them. Let me know what’s on your plate @maxKenngott !