Ang.py symmetry unifier

[martint98]

Description of the change

Reworked all of the symmetry cleaning for .ang headers. Now converts all known symmetries to their corresponding laue groups. Removed _get_point_group_from_space_group and replaced with _symmetry_unifier function

Progress of the PR

• [ ] Docstrings for all functions
• [ ] Unit tests with pytest for all lines
• [ ] Clean code style by running black via pre-commit

Minimal example of the bug fix or new feature

>>> from orix import vector
>>> v = vector.Vector3d([1, 1, 1])
>>> # Your new feature...

For reviewers

• [ ] The PR title is short, concise, and will make sense 1 year later.
• [ ] New functions are imported in corresponding __init__.py.
• [ ] New features, API changes, and deprecations are mentioned in the unreleased section in CHANGELOG.rst.