Add auto-ssm ami resolution for ubuntu

[aciba90]

Description

Add auto-ssm ami resolution for ubuntu

Issue #3224

Checklist

• Added tests that cover your change (if possible)
• Added/modified documentation as required (such as the README.md, or the userdocs directory)
• Manually tested
• Made sure the title of the PR is a good description that can go into the release notes
• (Core team) Added labels for change area (e.g. area/nodegroup) and kind (e.g. kind/improvement)

BONUS POINTS checklist: complete for good vibes and maybe prizes?! 🤯

• Backfilled missing tests for code in same general area 🎉
• Refactored something and made the world a better place 🌟

Manual tests

EKSCTL=eksctl
CLUSTER_NAME=my-cluster
COMMON_ARGS=( --verbose 5 )

${EKSCTL} "${COMMON_ARGS[@]}" create cluster -f - << EOF
apiVersion: eksctl.io/v1alpha5
kind: ClusterConfig

metadata:
  name: ${CLUSTER_NAME}
  region: eu-south-2
  version: '1.30'

nodeGroups:
  - name: ng-ubuntu
    instanceType: t3.micro
    desiredCapacity: 1
    amiFamily: Ubuntu2204
    ami: auto-ssm
    ssh:
        allow: true
    overrideBootstrapCommand: |
      #!/bin/bash
      /etc/eks/bootstrap.sh ${CLUSTER_NAME} >> /var/log/bootstrap.log
EOF
} 2>&1 >/tmp/eksctl.log

$ grep -i ssm /tmp/eksctl.log
265:2024-07-05 12:55:26 [▶]  resolving AMI using SSM Parameter resolver for region eu-south-2, instanceType t3.micro and imageFamily Ubuntu2204

[aciba90]

Hello team. I created this PR as draft because unit tests are broken due to #7845. Will work on them after unblocked, thanks.

[cPu1]

LGTM! Thanks, this is very thorough.