Covalent-ecs-plugin

Added

- Testing CICD pipeline

Changed

- Pre-commit install script.
- Some references of Fargate were changed to ECS.

Changed

- Changed global variable executor_plugin_name -> EXECUTOR_PLUGIN_NAME in executors to conform with PEP8.

Tests

- Updated tests for ECS Executor now using AWSExecutor base class
- Added pytest-asyncio
- Added missing pip deps to functional tests

Updated

- ECS Executor now inheriting from AWSExecutor
- Updated subnet and security group validation to conform to new 17 digit IDs as per <https://aws.amazon.com/about-aws/whats-new/2018/02/longer-format-resource-ids-are-now-available-in-amazon-ec2/>