ci(NODE-5736): update aws auth host and ecs task

[W-A-James]

Description

Updates AWS ECS task definition ARN to run on Ubuntu 20.04

What is changing?

• Use new environment variable for new ARN
• Update AWS test config to run on Ubuntu 20 and use new ARN
• Update config to use new standardized scripting

Is there new documentation needed for these changes?

No

What is the motivation for this change?

NODE-5736

Release Highlight

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Double check the following

• Ran npm run check:lint script
• Self-review completed using the steps outlined here
• PR title follows the correct format: type(NODE-xxxx)[!]: description
  • Example: feat(NODE-1234)!: rewriting everything in coffeescript
• Changes are covered by tests
• New TODOs have a related JIRA ticket

[W-A-James]

note that ECS tests are running into the following failures:

• -no-optional tests fail due to permissions error

[2024/01/25 10:38:05.577] sh71672| + npm run check:aws

[2024/01/25 10:38:05.577] sh71672|

[2024/01/25 10:38:05.577] sh71672| > mongodb@4.17.2 check:aws

[2024/01/25 10:38:05.577] sh71672| > mocha --config test/mocha_mongodb.json test/integration/auth/mongodb_aws.test.ts

[2024/01/25 10:38:05.577] sh71672|

[2024/01/25 10:38:05.595] sh71672| sh: 1: mocha: Permission denied

[2024/01/25 10:38:05.595] sh71672| INFO:__main__:RETURN CODE: 127

[2024/01/25 10:38:05.595] sh71672| ERROR:__main__:FAILED: 127

• regular ECS tests also fail due to permission error

[2024/01/25 10:35:36.957] sh47202| > mongodb@4.17.2 check:aws

[2024/01/25 10:35:36.957] sh47202| > mocha --config test/mocha_mongodb.json test/integration/auth/mongodb_aws.test.ts

[2024/01/25 10:35:36.957] sh47202|

[2024/01/25 10:35:36.979] sh47202| sh: 1: mocha: Permission denied

[2024/01/25 10:35:36.979] sh47202| INFO:__main__:RETURN CODE: 127
[2024/01/25 10:35:36.979] sh47202| ERROR:__main__:FAILED: 127