feat: implement delta-based test selection and CI reporting for PRs

conftest.py

@@ -124,11 +124,7 @@ def pytest_configure(config):
         install_reactor_import_hook()
 
 
-@pytest.hookimpl(tryfirst=True)
 def pytest_runtest_setup(item):
-    import os
-    os.environ["DELTA_TEST_NAME"] = item.nodeid
-
     # Skip tests based on reactor markers
     reactor = item.config.getoption("--reactor")
 
@@ -163,4 +159,3 @@ def pytest_runtest_setup(item):
 
 # Generate localhost certificate files, needed by some tests
 generate_keys()
-