Add support to use secrets

[gandrademello]

What feature do you want to see added?

Hello there,

One of the great things on ECS is the possibility of injecting secrets from both SecretsManager and Parameter Store, this allow you to use secrets without needing to expose the values on ECS task configurations.
Also this would be awesome for jenkins as this could be injected during task runtime and Jenkins itself doesn't need to store the credentials value in any of its configurations.

Wdyt?

Upstream changes

No response