test-plugin-piggyback: improved skipping of piggyback tests.

Skip setup & teardown steps as well of skipped `piggyback tests`.
Undesired setup & teardown steps were executed within `plugin tests`,
which resulted in CI jobs timing out.

Change-Id: I97f592e1a56928794450c5bede117d15e6db47f9

tests/plugins_integration/conftest.py

@@ -181,6 +181,9 @@ def _get_site(request: pytest.FixtureRequest) -> Iterator[Site]:
 # Todo: perform a proper site-cleanup and change this fixture's scope: CMK-18659
 @pytest.fixture(name="test_site_piggyback", scope="function")
 def _get_site_piggyback(request: pytest.FixtureRequest) -> Iterator[Site]:
+    if not request.config.getoption(name="--enable-piggyback"):
+        pytest.skip("Piggyback tests are not selected.")
+
     for site in get_site_factory(prefix="PB_").get_test_site(
         auto_cleanup=not checks.config.skip_cleanup
     ):

tests/plugins_integration/test_plugin_piggyback.py

@@ -28,10 +28,7 @@ def test_plugin_piggyback(
     test_site_piggyback: Site,
     source_host_name: str,
     dcd_connector: None,
-    pytestconfig: pytest.Config,
 ) -> None:
-    if not pytestconfig.getoption(name="--enable-piggyback"):
-        pytest.skip("Piggyback tests are not selected.")
 
     with setup_source_host_piggyback(test_site_piggyback, source_host_name):
         disk_dump = read_disk_dump(source_host_name)