feat[next]: Add support for tuple comprehensions

[SF-N]

Adds support for tuple comprehensions, e.g. for usage on tracers.

@gtx.field_operator
def testee(
    tracers: tuple[cases.IField, cases.IField], factor: int32
) -> tuple[cases.IField, cases.IField]:
    return tuple(tracer * factor for tracer in tracers)

[tehrengruber]

This is for direct access to tracers[0] * factor, tracers[1] * factor, which I personally think is an anti pattern. I left it here until we take a decision on this. We could also make it an optional feature. One of the disadvantages is that it is not possible to fully type check the field operator at definition time, since the tuple length is only known at call / compile time. The user will then get an error in unroll_map_tuple.