Update for compatibility with Trixie

Update for compatibility with Trixie:

• apertis-pkg-merge-upstream-to-downstreams: Don't print useless information while canceling pipelines.
• apertis-pkg-merge-upstream-to-downstreams: ensure merge request is created against the right project.
• Make sure the returned value of an executed sh is still a RunningCommand object.

tools/apertis-pkg-merge-upstream-to-downstreams

@@ -117,7 +117,6 @@ def cancel_branch_context_pipeline(project_id, branch, token, project_url):
     try:
         res = urllib.request.urlopen(get_id_req)
         json_res = json.load(res)
-        print(json_res)
         latest_job_id = json_res["id"]
     except urllib.error.HTTPError as e:
         print("ERROR:", e.read().decode())
@@ -136,7 +135,6 @@ def cancel_branch_context_pipeline(project_id, branch, token, project_url):
     print(f"Canceling useless pipeline on {branch}")
     try:
         res = urllib.request.urlopen(cancel_req).read().decode("utf-8")
-        print(res)
     except urllib.error.HTTPError as e:
         print("ERROR:", e.read().decode())