[Feature Request] Improve task termination handling in Fargate Spot

Improve Task termination mechanisms when running on Fargate Spot, for gracefully stopping the container.

#### Context
- This will leverage Fargate Spot usage and ensure containers ares stopped gracefully when capacity is reclaimed.
- You can refer to the [How to handle Fargate Spot termination notices](https://aws.amazon.com/blogs/compute/deep-dive-into-fargate-spot-to-run-your-ecs-tasks-for-up-to-70-less/) section.

#### Additional context

* [ ] :wave: I may be able to implement this feature request
* [ ] :warning: This feature might incur a breaking change

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This is a :rocket: Feature Request