feat: get tags and clean attributes

[guikcd]

Issue #, if available:
Closes: #317

Description of changes:

• Clean unnecessary attributes
• Include tag: to give possibility to propagate them for the next runTask/UpdateService step (TASK_DEFINITION)

Note: Most of clean code/logic/functions come from https://github.com/aws-actions/amazon-ecs-deploy-task-definition project.

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[siddharth7]

Landed on this PR while trying to figure out why our new task definitions are not showing up existing tags. Would be great if this gets merged!

[siddharth7]

@guikcd Do you have any ball park timeline for merging it?

[guikcd]

Not yet I didn't re-work on it since weeks. I was stuck on unit test; when I remove the added code, the tests with tags still pass. Seems that the test already pass unnecessary fields that are cleaned (in the test).

[jebl01]

This is golden! Running a fork with similar changes today, would really love to get rid of that 😄

[anitakrueger]

Is there anything we can do to help get this merged?

[guikcd]

I think I don't master the unit test part. Note that the code behave well in real functional test cases.
But for example, if I remove the tag code I've added previously and let the tags test, the unit test still pass. I'm probably missing something and as I'm not very experienced in jest (also in {Type,Java}Script) I need help to verify the tests are accurate.