add support for ecs clusters in ocean

[pathcl]

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Jira Ticket

Include a link to your Jira Ticket
Example: JIRAISS-1234

Demo

pathcl@espresso:~/go/src/github.com/pathcl/spotctl$ ./dist/spotctl ocean get cluster ecs
ID           NAME            CREATED      UPDATED
o-ac1a35a6   dev        2 days ago   18 hours ago
o-543e75f9   noprod   1 week ago   6 days ago

Please add a recording of the feature/bug fix in work. if you added new routes, the recording should show the request and response for each new/changed route

Checklist:

• I have filled relevant self assessment (NodeJS, Frontend, Backend)
• I have run ESlint on my changes and fixed all warnings and errors (NodeJS & Frontend Services)
• My code follows the style guidelines of this project
• I have performed a self-review of my own code
• I have validated all the requirements in the Jira task were answered
• I have all neccessary approvals for the design/mini design of this task
• I have approved the API changes and granular permission patterns (documentation subtask) (For public services only)