perf(engine): Use asyncio eager task factory for worker event loop

[daryllimyt]

Features

• Use asyncio eager task factory for worker event loop
• Improve asyncio performance on coroutines that can complete before being scheduled on the event loop

References

• Leverage eager tasks to optimize asyncio gather & TaskGroups further python/cpython#104144
• Backed by data from Instagram: Add eager task creation API to asyncio python/cpython#97696