ci: Fix the WPT export job after the repository change (#33228)

The GitHub search API is a bit sensitive. There isn't a great way to
search for the repository organization and the branch name when looking
for open PRs. Instead use the bot username as the author name, which
should likely have been having before. This fixes the WPT export job.

Signed-off-by: Martin Robinson <mrobinson@igalia.com>

python/wpt/exporter/__init__.py

@@ -180,7 +180,7 @@ class WPTSync:
                 wpt_branch_name_from_servo_pr_number(servo_pr.number)
             )
             upstream_pr = self.wpt.get_open_pull_request_for_branch(
-                downstream_wpt_branch
+                self.github_username, downstream_wpt_branch
             )
             if upstream_pr:
                 logging.info(

python/wpt/exporter/github.py

@@ -72,7 +72,9 @@ class GithubRepository:
         return GithubBranch(self, name)
 
     def get_open_pull_request_for_branch(
-        self, branch: GithubBranch
+        self,
+        github_username: str,
+        branch: GithubBranch
     ) -> Optional[PullRequest]:
         """If this repository has an open pull request with the
         given source head reference targeting the main branch,
@@ -82,7 +84,7 @@ class GithubRepository:
             "is:pr",
             "state:open",
             f"repo:{self.repo}",
-            f"author:{branch.repo.org}",
+            f"author:{github_username}",
             f"head:{branch.name}",
         ])
         response = authenticated(self.sync, "GET", f"search/issues?q={params}")

python/wpt/test.py

@@ -140,12 +140,11 @@ class MockGitHubAPIServer():
 
             assert params["is"] == "pr"
             assert params["state"] == "open"
-            assert "author" in params
             assert "head" in params
-            head_ref = f"{params['author']}:{params['head']}"
+            head_ref = f":{params['head']}"
 
             for pull_request in self.pulls:
-                if pull_request.head == head_ref:
+                if pull_request.head.endswith(head_ref):
                     return json.dumps({
                         "total_count": 1,
                         "items": [{