Fix bug with detection of configured role paths

Since we adopted ansible-compat and removed our hardcoded
DEFAULT_ROLES_PATH constant the role path code was no longer working.

This is switching to use of ansible-compat runtime for gathering
the role path.

src/ansiblelint/utils.py

@@ -62,6 +62,7 @@
     LoadingFailureRule,
     RuntimeErrorRule,
 )
+from ansiblelint.app import get_app
 from ansiblelint.config import options
 from ansiblelint.constants import NESTED_TASK_KEYS, PLAYBOOK_TASK_KEYWORDS, FileType
 from ansiblelint.errors import MatchError
@@ -444,10 +445,8 @@ def _rolepath(basedir: str, role: str) -> Optional[str]:
         path_dwim(basedir, os.path.join("..", role)),
     ]
 
-    if constants.DEFAULT_ROLES_PATH:
-        search_locations = constants.DEFAULT_ROLES_PATH
-        if isinstance(search_locations, str):
-            search_locations = search_locations.split(os.pathsep)
+    search_locations = get_app().runtime.config["DEFAULT_ROLES_PATH"]
+    if search_locations and isinstance(search_locations, list):
         for loc in search_locations:
             loc = os.path.expanduser(loc)
             possible_paths.append(path_dwim(loc, role))