Support reading EBSD patterns from Bruker h5ebsd file with ROI

[hakonanes]

Signed-off-by: Håkon Wiik Ånes hwaanes@gmail.com

Description of the change

• Support reading EBSD patterns from a Bruker h5ebsd (HDF5) file with a region of interest (ROI)
• Reduce test file size of the Bruker h5ebsd file, and also add two other test files (still a total file size reduction)

Thanks to @Fred-Ad for reporting this (and other) issues in #329, and also providing a dataset to test this on. Much appreciated!

Progress of the PR

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

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 doc/changelog.rst.

[hakonanes]

Will merge after checks pass.