Resolve "Add set_tick_locator and set_tick_formatter helpers"

This MR implements the set_tick_locator and set_tick_formatter helpers.

Details

Both functions requires the same wrapping interface to the respective Matplotlib functions. That's why I implemented the actual functionality in the _set_tick_locators_or_formatters function.

Anything to double-check?

• Where to best put the documentation of the functionality?
• Everything works as expected?

Can this MR be accepted?

• Implementation ready
• Tests added or adjusted
• Documentation extended or updated

• Code quality
  • Changes follow coding guidelines
  • Checked code coverage on new and adjusted code

• Ready for merging
  • Pipeline passes without warnings
  • History cleaned-up or squash option set
  • Changelog entry added
  • Version number bumped
  • Reviewed & approved by @

Related issues

Closes #268 (closed)