Move pytest fixtures to conftest.py

[dorothykiz1]

When fixtures are not defined in the standard conftest.py and are defined elsewhere in other files,
once imported for reference they are not recognized.

Flake8 example error : F401 '.tools.example_results' imported but unused

What is expected is to move all fixtures to the conftest.py file, this will not require the unnecessary imports for fixtures hence no errors of not found fixtures in the CI as shown below.

ie. fixture 'example_results' not found

[dorothykiz1]

@LucyJimenez @datapythonista i will work on this

[dorothykiz1]

Most of the fixtures have been moved to the conftest.py file and 3 files with 4 fixtures are pending,i have opened PRs for them i will be editing this comment once merged

(venv) dorothy@dorothy-Latitude-5480:~/Desktop/sprint/asv$ grep -R --exclude-dir="build" --exclude="*.css" "@pytest.fixture" *
test/test_dev.py:@pytest.fixture
test/test_dev.py:@pytest.fixture
test/test_step_detect.py:@pytest.fixture(params=[
test/test_publish.py:@pytest.fixture(params=[
test/conftest.py:@pytest.fixture(params=[
test/conftest.py:@pytest.fixture
test/conftest.py:@pytest.fixture
test/conftest.py:@pytest.fixture
test/conftest.py:@pytest.fixture(scope="session")
test/conftest.py:@pytest.fixture(scope="session")
test/conftest.py:@pytest.fixture
test/conftest.py:@pytest.fixture(scope="session")
test/conftest.py:@pytest.fixture
test/conftest.py:@pytest.fixture