Simplify member account import process

[JoeShi]

Describe the feature

Optimize the sub account import process, only ask the user to input account name, account ID, stack name.

Use Case

I'm always frustrated when input cross-account-role, fluent bit agent doc, config doc, s3 bucket, stack id, KMS key and other parameters. Too much parameters for me,

Proposed Solution

Solution 1 : All outputs are fixed, for example stackname-resource_name, remove the random suffix.

Solution 2 (recommend, if no technical blocker): Just use a CloudFormation DescribeStack API call to get the parameters from member account.

Other Information

No response

Solution version used

v2.1.1