CLI command added to list aws resources created by CAPA

[shivi28]

Usage:
clusterawsadm resource list [flags]

Eg: clusterawsadm resource list --cluster-name=<cluster name> --region=<region>

Output options: table(default), yaml, json

PARTITION   SERVICE                REGION       ACCOUNTID      RESOURCE                                 ARN
aws         ec2                    ap-south-1   832764931379   elastic-ip/eipalloc-0a4ef32fcffceaaf2    arn:aws:ec2:ap-south-1:832764931379:elastic-ip/eipalloc-0a4ef32fcffceaaf2
aws         ec2                    ap-south-1   832764931379   elastic-ip/eipalloc-04f393e86fd018583    arn:aws:ec2:ap-south-1:832764931379:elastic-ip/eipalloc-04f393e86fd018583
aws         ec2                    ap-south-1   832764931379   elastic-ip/eipalloc-0ef70b86d684b10a0    arn:aws:ec2:ap-south-1:832764931379:elastic-ip/eipalloc-0ef70b86d684b10a0
aws         ec2                    ap-south-1   832764931379   instance/i-07761eeeacb0692b0             arn:aws:ec2:ap-south-1:832764931379:instance/i-07761eeeacb0692b0
many more ...

What type of PR is this?
/kind feature

What this PR does / why we need it:
Introduce a CLI command to list AWS resources created by CAPA

Which issue(s) this PR fixes (optional, in fixes #<issue number>(, fixes #<issue_number>, ...) format, will close the issue(s) when PR gets merged):
Fixes #2381

Special notes for your reviewer:

Checklist:

• squashed commits
• includes documentation
• adds unit tests
• adds or updates e2e tests

Release note:

CLI command to list AWS resources created by CAPA

[randomvariable]

One issue with JSON and YAML output and if you could move the code around a bit, but otherwise great.
Thanks!

[richardcase]

@shivi28 - looking good. There is one minor typo i can see.

[richardcase]

/lgtm
/approve

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