Drop old Tool test parsing logic in favor of ToolSource logic.

Add to tool_util, drop all the Galaxy mocking required using the older tool based logic.

lib/galaxy/tools/__init__.py

@@ -149,7 +149,7 @@
 from galaxy.tools.parameters.meta import expand_meta_parameters
 from galaxy.tools.parameters.workflow_utils import workflow_building_modes
 from galaxy.tools.parameters.wrapped_json import json_wrap
-from galaxy.tools.test import parse_tests
+from galaxy.tool_util.verify.parse import parse_tool_test_descriptions
 from galaxy.util import (
     in_directory,
     listify,
@@ -1306,9 +1306,10 @@ def __parse_trackster_conf(self, tool_source):
             self.trackster_conf = TracksterConfig.parse(trackster_conf)
 
     def parse_tests(self):
-        if tests_source := self.tool_source:
+        if self.tool_source:
+            test_descriptions = parse_tool_test_descriptions(self.tool_source, self.id)
             try:
-                self.__tests = json.dumps([t.to_dict() for t in parse_tests(self, tests_source)], indent=None)
+                self.__tests = json.dumps([t.to_dict() for t in test_descriptions], indent=None)
             except Exception:
                 self.__tests = None
                 log.exception("Failed to parse tool tests for tool '%s'", self.id)