[24.0] Make sure that all Linter subclasses are imported for listing them

lib/galaxy/tool_util/lint.py

@@ -102,12 +102,21 @@ def name(cls) -> str:
         return cls.__name__
 
     @classmethod
-    def list_listers(cls) -> List[str]:
+    def list_linters(cls) -> List[str]:
         """
         list the names of all linter derived from Linter
         """
+        submodules.import_submodules(galaxy.tool_util.linters)
         return [s.__name__ for s in cls.__subclasses__()]
 
+    list_listers: Callable[[], List[str]]  # deprecated alias
+
+
+# Define the `list_listers` alias outside of the `Linter` class so that
+# @classmethod's change to `list_linters`s signature has taken effect and mypy
+# doesn't report an [assignment] error
+Linter.list_listers = Linter.list_linters
+
 
 class LintMessage:
     """