Per-projection geometry cone3D_souv

[gfardell]

Changes

This is adding per-projection geometry.

Building on @effepivi's work in #1850

Wrappers/Python/cil/framework/acquisition_geometry.py

1. Adds a cone3D_souv acquisition data type
2. Adds factory method to create datatype
3. Updates some behaviour of acquisition geometry members/methods to account for it
4. Updates to docstrings of each AcquisitionGeometry factory for consistency.

Wrappers/Python/cil/framework/labels.py

1. Adds cone_souv to the AcquisitionType labels

Wrappers/Python/cil/plugins/astra/utilities/convert_geometry_to_astra_vec_3D.py

1. Updates to set up astra geometry from cone souv

Wrappers/Python/cil/utilities/display.py

1. Added new display method for souv type.

Testing you performed

Please add any demo scripts to https://github.com/TomographicImaging/CIL-Demos/tree/main/misc

Related issues/links

closes #1848
closes #1849

Checklist

• I have performed a self-review of my code
• I have added docstrings in line with the guidance in the developer guide
• I have updated the relevant documentation
• I have implemented unit tests that cover any new or modified functionality
• CHANGELOG.md has been updated with any functionality change
• Request review from all relevant developers
• Change pull request label to 'Waiting for review'

Contribution Notes

Please read and adhere to the developer guide and local patterns and conventions.

• The content of this Pull Request (the Contribution) is intentionally submitted for inclusion in CIL (the Work) under the terms and conditions of the Apache-2.0 License
• I confirm that the contribution does not violate any intellectual property rights of third parties

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