ref: unify signature of get_annotations (#74870)

mypy 1.11 points out this is inconsistent

<!-- Describe your PR here. -->

src/sentry/plugins/base/v2.py

@@ -331,7 +331,7 @@ def get_actions(self, request, group) -> list[tuple[str, str]]:
         """
         return []
 
-    def get_annotations(self, group, **kwargs):
+    def get_annotations(self, group) -> list[dict[str, str]]:
         """
         Return a list of annotations to append to this aggregate.
 
@@ -340,7 +340,7 @@ def get_annotations(self, group, **kwargs):
         The properties of each tag must match the constructor for
         :class:`sentry.plugins.Annotation`
 
-        >>> def get_annotations(self, group, **kwargs):
+        >>> def get_annotations(self, group):
         >>>     task_id = GroupMeta.objects.get_value(group, 'myplugin:tid')
         >>>     if not task_id:
         >>>         return []

src/sentry/templatetags/sentry_plugins.py

@@ -28,7 +28,7 @@ def get_actions(group, request):
 
 
 @register.filter
-def get_annotations(group, request=None):
+def get_annotations(group, request=None) -> list[dict[str, str]]:
     project = group.project
 
     annotation_list = []

tests/sentry/templatetags/test_sentry_plugins.py

@@ -10,7 +10,7 @@ class SamplePlugin(Plugin2):
     def get_actions(self, request, group) -> list[tuple[str, str]]:
         return [("Example Action", f"http://example.com?id={group.id}")]
 
-    def get_annotations(self, group):
+    def get_annotations(self, group) -> list[dict[str, str]]:
         return [
             {"label": "Example Tag", "url": f"http://example.com?id={group.id}"},
             {"label": "Example Two"},