Enable fixture dynamic scoping during test run

pytest version 5.2.2

Tried to use dynamic scopes for fixtures. However, the scope definition is executed only once - during the fixture definition.
We would like to have option to control fixture scope during test run.
This will allow code re-use in tests which need the code in different scope.
For example: set up a docker - one test needs it in function level and a separate test needs it in module level.

@pytest.fixture()
def some_fixture():
    pass

# test_method.py
@pytest.mark.scope('some_fixture', 'module')
def test_method(some_fixture):
    pass

# test_function.py
@pytest.mark.scope('some_fixture', 'function')
def test_method(some_fixture):
    pass

Start by reproducing the dynamic-scope example on pytest 5.2.2 and trace where fixture scope is evaluated; the issue names no files or tests. Done means fixture scope can be selected per test run as shown, while preserving the existing fixture behavior.