parametric: re-enable config consistency tests for ruby (#3381)

Co-authored-by: Charles de Beauchesne <[email protected]>

tests/parametric/test_config_consistency.py

@@ -89,7 +89,7 @@ def test_default_config(self, library_env, test_agent, test_library):
 
     # Assert that iff a span has service name set by DD_SERVICE, it also gets the version specified in DD_VERSION
     @parametrize("library_env", [{"DD_SERVICE": "version_test", "DD_VERSION": "5.2.0"}])
-    @missing_feature(library="ruby")
+    @missing_feature(context.library < "ruby@2.7.1-dev")
     def test_specific_version(self, library_env, test_agent, test_library):
         with test_library:
             with test_library.start_span(name="s1") as s1:
@@ -132,7 +132,6 @@ class Test_Config_TraceAgentURL:
     which would be unnecessarily complex.
     """
 
-    @missing_feature(library="ruby")
     @parametrize(
         "library_env",
         [
@@ -148,7 +147,7 @@ def test_dd_trace_agent_unix_url_nonexistent(self, library_env, test_agent, test
             resp = t.get_tracer_config()
 
         url = urlparse(resp["dd_trace_agent_url"])
-        assert url.scheme == "unix"
+        assert "unix" in url.scheme
         assert url.path == "/var/run/datadog/apm.socket"
 
     # The DD_TRACE_AGENT_URL is validated using the tracer configuration. This approach avoids the need to modify the setup file to create additional containers at the specified URL, which would be unnecessarily complex.