Cleanup tox configs and unit tests

[tremble]

SUMMARY

As discussed in #2212 cleans up the unit tests to move importing some of the fixtures into conftest.py

tox configs needed a little cleanup to ensure that things were consistently in the import path.

ISSUE TYPE

• Feature Pull Request

COMPONENT NAME

pyproject.toml
tests/unit/conftest.py
tests/unit/plugins/
tox.ini

ADDITIONAL INFORMATION

[softwarefactory-project-zuul]

Build succeeded.
https://ansible.softwarefactory-project.io/zuul/buildset/8d9fbe6234d94e4abf019c471b18bfd9

✔️ ansible-galaxy-importer SUCCESS in 3m 15s (non-voting)
✔️ build-ansible-collection SUCCESS in 10m 32s

[softwarefactory-project-zuul]

Build succeeded.
https://ansible.softwarefactory-project.io/zuul/buildset/958ba46d2042412ea508c5581ba75a32

❌ ansible-galaxy-importer FAILURE in 4m 44s (non-voting)
✔️ build-ansible-collection SUCCESS in 10m 13s

[softwarefactory-project-zuul]

Build succeeded.
https://ansible.softwarefactory-project.io/zuul/buildset/02573db888f14cec86b8d4b9f0698628

❌ ansible-galaxy-importer FAILURE in 5m 04s (non-voting)
✔️ build-ansible-collection SUCCESS in 10m 32s

[softwarefactory-project-zuul]

Build succeeded.
https://ansible.softwarefactory-project.io/zuul/buildset/bcd190ea922341b1b9a2209c282a9e4d

✔️ ansible-galaxy-importer SUCCESS in 3m 22s (non-voting)
✔️ build-ansible-collection SUCCESS in 10m 24s

[softwarefactory-project-zuul]

Build succeeded.
https://ansible.softwarefactory-project.io/zuul/buildset/77ce0f04854b4e4c8218db87db22871a

❌ ansible-galaxy-importer FAILURE in 5m 07s (non-voting)
✔️ build-ansible-collection SUCCESS in 10m 27s

[softwarefactory-project-zuul]

Build succeeded.
https://ansible.softwarefactory-project.io/zuul/buildset/4639bc81581f4e6a9e3cbd909e8bc689

❌ ansible-galaxy-importer FAILURE in 4m 16s (non-voting)
✔️ build-ansible-collection SUCCESS in 10m 53s

[softwarefactory-project-zuul]

Build succeeded (gate pipeline).
https://ansible.softwarefactory-project.io/zuul/buildset/241e6fd787db409a8b3dae383d73f0b7

✔️ ansible-galaxy-importer SUCCESS in 3m 12s (non-voting)
✔️ build-ansible-collection SUCCESS in 10m 41s

[patchback]

Backport to stable-9: 💔 cherry-picking failed — conflicts found

❌ Failed to cleanly apply cfdcc05 on top of patchback/backports/stable-9/cfdcc05a27e8d56df294e5def845c5c9f4e0b2d7/pr-2219

Backporting merged PR #2219 into main

1. Ensure you have a local repo clone of your fork. Unless you cloned it
   from the upstream, this would be your origin remote.
2. Make sure you have an upstream repo added as a remote too. In these
   instructions you'll refer to it by the name upstream. If you don't
   have it, here's how you can add it:

   $ git remote add upstream https://github.com/ansible-collections/community.aws.git

3. Ensure you have the latest copy of upstream and prepare a branch
   that will hold the backported code:

   $ git fetch upstream
   $ git checkout -b patchback/backports/stable-9/cfdcc05a27e8d56df294e5def845c5c9f4e0b2d7/pr-2219 upstream/stable-9

4. Now, cherry-pick PR Cleanup tox configs and unit tests #2219 contents into that branch:

   $ git cherry-pick -x cfdcc05a27e8d56df294e5def845c5c9f4e0b2d7

   If it'll yell at you with something like fatal: Commit cfdcc05a27e8d56df294e5def845c5c9f4e0b2d7 is a merge but no -m option was given., add -m 1 as follows instead:

   $ git cherry-pick -m1 -x cfdcc05a27e8d56df294e5def845c5c9f4e0b2d7

5. At this point, you'll probably encounter some merge conflicts. You must
   resolve them in to preserve the patch from PR Cleanup tox configs and unit tests #2219 as close to the
   original as possible.
6. Push this branch to your fork on GitHub:

   $ git push origin patchback/backports/stable-9/cfdcc05a27e8d56df294e5def845c5c9f4e0b2d7/pr-2219

7. Create a PR, ensure that the CI is green. If it's not — update it so that
   the tests and any other checks pass. This is it!
   Now relax and wait for the maintainers to process your pull request
   when they have some cycles to do reviews. Don't worry — they'll tell you if
   any improvements are necessary when the time comes!

🤖 @patchback
I'm built with octomachinery and
my source is open — https://github.com/sanitizers/patchback-github-app.