Remove wheel requirement and remove testing dependencies from the CI.

[h-mayorquin]

Three things in the PR:

• The latest version of scan image supports modern python build systems so installing wheel is no longer necessary: https://gitlab.com/vidriotech/scanimagetiffreader-python/-/merge_requests/2/diffs
• Moving the dependencies to testing instead of having the implicit in the CI. Companion to https://github.com/catalystneuro/neuroconv/pull/913
• Remove the editable installation because that mode is unstable in setuptools https://setuptools.pypa.io/en/latest/userguide/development_mode.html

[h-mayorquin]

Also related to the tests added in https://github.com/catalystneuro/roiextractors/pull/347#pullrequestreview-2117028131