feat: push module updates directly to main

[AlexanderLanin]

Summary

• Replace peter-evans/create-pull-request with a direct git push to main in the module update workflow
• Remove the now-unnecessary pull-requests: write permission
• Reduces latency and manual approval overhead for automated module updates

Test plan

• Trigger workflow manually via workflow_dispatch and verify it pushes directly to main
• Verify scheduled runs commit and push without creating PRs