framecode: Fix missing BasicCFBlock argument

[iBug]

Updated for v0.16: The (renamed) BasicCFBlock class still requires 4 arguments in a different order and with none being optional. The new __init__ method as provided by @dataclass looks like this:

def __init__(self,
    dispatch_state: Callable[[SDFGState], str],  # from ControlFlow
    parent: Optional['ControlFlow'],  # from ControlFlow
    last_block: bool,  # from ControlFlow
    state: SDFGState,
)

The current code still supplies 3 arguments and in a wrong order. This PR fixes that.

Original PR description (when I was still running on DaCe v0.15.1) follows.

---

With optimizer.detect_control_flow == False, this part of code causes an error later on:

  File "/home/ibug/examples/dace/dace/codegen/control_flow.py", line 221, in as_cpp
    expr += elem.as_cpp(codegen, symbols)
            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/home/ibug/examples/dace/dace/codegen/control_flow.py", line 128, in as_cpp
    sdfg = self.state.parent
           ^^^^^^^^^^^^^^^^^
AttributeError: 'bool' object has no attribute 'parent'

I identified this as cflow.SingleState requiring 4 arguments to its __init__ method with the last one being optional, i.e.:

def __init__(self,
    dispatch_state: Callable[[SDFGState], str],  # from ControlFlow
    parent: Optional['ControlFlow'],  # from ControlFlow
    state: SDFGState,
    last_state: bool = False,
)

The current code incorrectly feeds 3 and did not trigger a TypeError due to the last one having a default value.

This PR adds back the missing parent argument, although I'm not sure if the sdfg object is correct. Local testing shows that None suffices, though.

[iBug]

Looks like I was running against DaCe 0.15, I'll need to take a closer look.

[tbennun]

@iBug Thank you for the report! I am not sure what caused this, as I use this mode often (but maybe before the latest release). @phschaad does the PR makes sense?

[phschaad]

This fix absolutely makes sense, thank you for catching and fixing this! LGTM