Add acq prob model info dict as a new pickled attribute

[taldcroft]

Description

This finally takes advantage of the info infrastructure in https://github.com/sot/ska_helpers/pull/33 to provide clear provenance of the acquisition probability model that was used to generate an acq catalog.

Requires

• https://github.com/sot/chandra_aca/pull/151
• https://github.com/sot/ska_helpers/pull/33

Interface impacts

Adds a new acq_prob_model_info meta-attribute to AcqTable.

Testing

Unit tests

Tested in a dev ska with the required ska_helpers and chandra_aca in the path.

• [x] Mac

Independent check of unit tests by Jean

• [x] Linux

Functional tests

No functional testing.