Function birli::flags::init_flag_array

pub fn init_flag_array(
    context: &CorrelatorContext, 
    mwalib_timestep_range: &Range<usize>, 
    mwalib_coarse_chan_range: &Range<usize>, 
    timestep_flags: Option<&[bool]>, 
    coarse_chan_flags: Option<&[bool]>, 
    fine_chan_flags: Option<&[bool]>, 
    baseline_flags: Option<&[bool]>
) -> Array3<bool>

Produce a vector of flags for fine each channel in the selected range of channels. Initialize a 3D array of bool flags for each timestep, channel, baseline provided.

Optionally provide flags for the timestep, channel and baseline axes

TODO: fix clippy::too_many_arguments