Add 2022 fit coefficients and hack to apply for warm_frac above 0.27

[taldcroft]

See the final plots in the link below comparing to the PEA 2022 test data: https://github.com/sot/aca_stats/blob/a2dbe18d/fit_flight_acq_prob_model_with_pea.ipynb

Note that this is a PR to merge into the dark-model-acq-model (PR #37) branch. Most likely it won't go into flight in this form but it work for now for analysis.

cc: @mbaski @jeanconn

[taldcroft]

Closing, this has served its purpose but is no longer relevant. No need to delete the branch immediately, however.