cgit/tasks: Allow passing extra parameters to task

This unifies with other lister tasks modules. And this allow the cgit task to
be scheduled by the add-forge-now scheduler cli.

Refs. swh/infra/sysadm-environment#4813

swh/lister/cgit/tasks.py

-# Copyright (C) 2019-2021 The Software Heritage developers
+# Copyright (C) 2019 The Software Heritage developers
 # License: GNU General Public License version 3, or any later version
 # See top-level LICENSE file for more information
 
-from typing import Dict, Optional
+from typing import Dict
 
 from celery import shared_task
 
@@ -10,13 +10,9 @@ from .lister import CGitLister
 
 
 @shared_task(name=__name__ + ".CGitListerTask")
-def list_cgit(
-    url: str, instance: Optional[str] = None, base_git_url: Optional[str] = None
-) -> Dict[str, str]:
+def list_cgit(**lister_args) -> Dict[str, str]:
     """Lister task for CGit instances"""
-    lister = CGitLister.from_configfile(
-        url=url, instance=instance, base_git_url=base_git_url
-    )
+    lister = CGitLister.from_configfile(**lister_args)
     return lister.run().dict()
 
 

swh/lister/cgit/tests/test_tasks.py

-# Copyright (C) 2019-2021 The Software Heritage developers
+# Copyright (C) 2019 The Software Heritage developers
 # See the AUTHORS file at the top-level directory of this distribution
 # License: GNU General Public License version 3, or any later version
 # See top-level LICENSE file for more information
@@ -22,7 +22,9 @@ def test_cgit_lister_task(
     lister.from_configfile.return_value = lister
     lister.run.return_value = ListerStats(pages=10, origins=500)
 
-    kwargs = dict(url="https://git.kernel.org/", instance="kernel", base_git_url=None)
+    kwargs = dict(
+        url="https://git.kernel.org/", instance="kernel", base_git_url=None, max_pages=1
+    )
 
     res = swh_scheduler_celery_app.send_task(
         "swh.lister.cgit.tasks.CGitListerTask",