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Disable frequency chunking for full-Jones solves

David Rafferty requested to merge remove_di_solve_frequency_chunking into master

This MR fixes disables the frequency chunking used during the full-Jones solves, as these solves use the MODEL_DATA column which cannot be used with frequency chunking. Such chunking is not needed in any case for the full-Jones solves, as it is a direction-independent solve and thus the memory usage is very low.

For future reference, the error raised by DP3 when frequency chunking is used in this case is the following:

std exception detected: The column MODEL_DATA has shape NCORR: 4, NCHAN: 480, NBL: 1891, while the input buffer for the current step has shape NCORR: 4, NCHAN: 82, NBL: 1891.
Any operation which alters the number of channels, correlations can cause a shape mismatch (example: filter, average, ...). Also operations which will change the metadata can cause a mismatch (example: phase shift, upsample, station adder, ..)

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