Mute possible warnings when randomly generating config files

We can't say upfront of the randomly generated config files will trigger
ConfigWarning, so mute all instead of doing pytest.warns.

tests/unit_tests/config/test_ert_config.py

@@ -505,6 +505,7 @@ def test_that_subst_list_is_given_default_runpath_file():
     )
 
 
+@pytest.mark.filterwarnings("ignore::ert.config.ConfigWarning")
 @pytest.mark.usefixtures("set_site_config")
 @settings(max_examples=10)
 @given(config_generators())
@@ -518,6 +519,7 @@ def test_that_creating_ert_config_from_dict_is_same_as_from_file(
         ) == ErtConfig.from_file(filename)
 
 
+@pytest.mark.filterwarnings("ignore::ert.config.ConfigWarning")
 @pytest.mark.usefixtures("set_site_config")
 @settings(max_examples=10)
 @given(config_generators())
@@ -611,6 +613,7 @@ def test_queue_config_max_running_invalid_values(max_running_value, expected_err
         ErtConfig.from_file(test_config_file_name)
 
 
+@pytest.mark.filterwarnings("ignore::ert.config.ConfigWarning")
 @pytest.mark.usefixtures("use_tmpdir")
 @given(st.integers(min_value=0), st.integers(min_value=0), st.integers(min_value=0))
 def test_num_cpu_vs_torque_queue_cpu_configuration(
@@ -1617,6 +1620,7 @@ def test_using_relative_path_to_eclbase_sets_jobname_to_basename(tmp_path):
     )
 
 
+@pytest.mark.filterwarnings("ignore::ert.config.ConfigWarning")
 @pytest.mark.parametrize(
     "param_config", ["coeffs_priors", "template.txt output.txt coeffs_priors"]
 )