Support multiple tags for ECR Push task

[bryceitoc9]

Customer request: support adding multiple tags at a time with the ECR Push task.

• Commas are allowed in tags, so a comma-separated list is not ideal
• Potentially use a textarea input and create a tag per line?

[ZisisFl]

Hello @bryceitoc9, the only work around for this issue was to put as many ECRPushImage@1 tasks as my tags in the same job that the image was build. This way the image is registered in ECR with multiple tags. Of course it would be more convenient to have an option for multiple tags like in buildAndPush command but it does the trick