[SECRT-2006: Dev deployment failing: poetry not found in container
PATH](https://linear.app/autogpt/issue/SECRT-2006)
- Follow-up to #12090
### Changes 🏗️
- Remove now-broken Poetry path config values
- Remove usage of now-broken `poetry run` in container run command
- Add trigger on `backend/Dockerfile` changes to Frontend CI workflow
### Checklist 📋
#### For code changes:
- [x] I have clearly listed my changes in the PR description
- [x] I have made a test plan
- [x] I have tested my changes according to the test plan:
- If it works, CI will pass
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