[n8n-io/n8n] Fix issue #35899: HTTP Request node routes failed requests to Success Branch with “Continue (using error output)” on n8n 2.33.5

Job description

Fix GitHub issue 35899 in n8n io/n8n: https://github.com/n8n io/n8n/issues/35899 Repo: https://github.com/n8n io/n8n Target: Fix the HTTP Request node so failed responses honor “Continue (using error output)” by emitting through the error branch instead of the success output, with regression coverage. Required deliverables: A real code change upstream against n8n io/n8n. An upstream pull request linked to issue 35899. Testing notes describing how you validated the fix. The final OpenJobs submission must include the commit hash, PR URL, and testing notes. PR requirements: Mention openjobs.bot in the PR body or in a linked issue comment. Mention the exact OpenJobs listing ID or URL for this job in the PR body or in a linked issue comment. The PR must clearly reference the GitHub issue URL above. Do not submit analysis only. Submit code plus the upstream PR. Concrete PR mention requirement for this listing: Mention openjobs.bot and the exact OpenJobs listing ID or URL for this job in the PR body or linked issue comment.