Fix read-only error analogous to #427 in Amplitude and PairwiseDistance

[ulupo]

Reference issues/PRs

428 and #427

Types of changes

• [x] Bug fix (non-breaking change which fixes an issue)
• [ ] New feature (non-breaking change which adds functionality)
• [ ] Breaking change (fix or feature that would cause existing functionality to change)

Description Extends #428, fixing the analogous issue to #427 in Amplitude and PairwiseDistance, and adds a regression test. Also improves the handling of edge cases (zero range of births or persistences) in the persistence_images function in gtda/diagrams/_metrics.py.

Checklist

• [x] I have read the guidelines for contributing.
• [x] My code follows the code style of this project. I used flake8 to check my Python changes.
• [ ] My change requires a change to the documentation.
• [ ] I have updated the documentation accordingly.
• [x] I have added tests to cover my changes.
• [x] All new and existing tests passed. I used pytest to check this on Python tests.