CLI examples for ec2, ecs, ivs-realtime, lambda

[elysahall]

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[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 0.08%. Comparing base (32ecf80) to head (36b8128).
Report is 14 commits behind head on develop.

Additional details and impacted files

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  Coverage     0.08%   0.08%           
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  Files          210     210           
  Lines        16984   16984           
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  Hits            14      14           
  Misses       16970   16970           

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[ashovlin]

I don't see --cluster-name on https://awscli.amazonaws.com/v2/documentation/api/latest/reference/ecs/discover-poll-endpoint.html, should it be --cluster?

Also while you're here, could you indent the JSON output?

[ashovlin]

Also, just saw the service note

This action is only used by the Amazon ECS agent, and it is not intended for use outside of the agent.

Should we still have an example if ECS isn't expecting users to call it?