### What problem does this PR solve?
Improve usability of Node.js/JavaScript code executor.
### Type of change
- [x] Refactoring
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Co-authored-by: Kevin Hu <kevinhu.sh@gmail.com>
Co-authored-by: writinwaters <93570324+writinwaters@users.noreply.github.com>
### What problem does this PR solve?
Switching threading.Lock() to asyncio.Lock(), since threading.Lock() is
blocking.
### Type of change
- [x] Performance Improvement
### What problem does this PR solve?
Add code_executor_manager. #4977.
### Type of change
- [x] New Feature (non-breaking change which adds functionality)
