feat: Switch from nosetest to pytest (#10177)

* Switch from nosetest to pytest

Fix schedule tests

Collect pytest coverage

Move pytest config into pytest.ini

Move cov to the pytest.ini

* Append coverage for the 2nd run

* Add coverage to all commands

* Coverage only for tests

* Get coverage from 1 place

* Rename classes to be  pytest compatible

* Test coverage for examples and tests

* Max diff to -1

* Explain how to run pytest for the whole project

* Do not append code coverage for the main run

* Do not run coverage on examples

Co-authored-by: bogdan kyryliuk <bogdankyryliuk@dropbox.com>

tests/strategy_tests.py

@@ -50,10 +50,7 @@ mock_positions = {
 }
 
 
-class CacheWarmUpTests(SupersetTestCase):
-    def __init__(self, *args, **kwargs):
-        super(CacheWarmUpTests, self).__init__(*args, **kwargs)
-
+class TestCacheWarmUp(SupersetTestCase):
     def test_get_form_data_chart_only(self):
         chart_id = 1
         result = get_form_data(chart_id, None)