[aws/azure] Automate and improve the steps to resize a node

 
*USER STORY:*

As a SPLAT engineer I would like to create a script/plugin to safety improve the steps to resize a node without impacting in availability, so the platform operators can safety run resize operations decreasing the impact on a cluster.

*DESCRIPTION:*
The steps to resize a node was created on cards [1] , after some review with internal teams we could see some opportunities to take those actions in a safety approach, those steps will impact in more human check when we are using a documentation/KCS.

The intention of this card is to automate the steps to help all platform operators take those actions decreasing the impact on cluster and also the total time to run those steps.

The minimal automation for flow covered on the doc was created when reviewing the KCS, the execution log is available here: https://asciinema.org/a/440667 

This card will be used if we can move forward with that script as a 'oc plugin' in a structured project, or just keep the steps on the KCS. 

*Required:*

• validate if it can be selected as a plugin and share it internally (reference on KCS)

if yes:

• 1. isolate to a dedicated project

*ACCEPTANCE CRITERIA:*

• can we share with CEE? or just be a open source project without reference on KCS?

*ENGINEERING DETAILS:*

 [1] Original cards describing manual steps to resize:

- merged doc - aws/azure

• KCS
• sample execution steps: https://asciinema.org/a/440667