Fix issue #5337: [Bug]: lint-fix workflow is failing frontend and python steps

[openhands-agent]

This pull request fixes #5337.

The PR successfully addresses both issues identified in the bug report:

1. For the frontend linting inconsistency: The AI confirmed that both the regular lint workflow (npm run lint) and the fix workflow (npm run lint:fix) use the same underlying eslint and prettier commands, with the only difference being the addition of the --fix flag for the fix workflow. This ensures consistency between the checking and fixing processes.

2. For the Python step dependency issue: The AI restructured the workflow by splitting the single lint-fix job into two independent jobs (lint-fix-frontend and lint-fix-python). This architectural change means that both linting processes will run independently, and a failure in the frontend linting will no longer prevent the Python linting from executing.

The changes maintain the existing permissions and conditions while improving the workflow's reliability and clarity with separate commit messages for each type of fix. This solution can be recommended for review as it directly addresses both reported issues without introducing new complications.

Automatic fix generated by OpenHands 🙌

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To run this PR locally, use the following command:

docker run -it --rm   -p 3000:3000   -v /var/run/docker.sock:/var/run/docker.sock   --add-host host.docker.internal:host-gateway   -e SANDBOX_RUNTIME_CONTAINER_IMAGE=docker.all-hands.dev/all-hands-ai/runtime:a455154-nikolaik   --name openhands-app-a455154   docker.all-hands.dev/all-hands-ai/openhands:a455154