Add skip checkout input

[goruha]

what

• Add skip checkout input

why

• To be consistent with the Plan and apply actions that now allow to skip checkout

references

• Replace describe-config for atmos-get-setting, add optional cache and azure storage options github-action-atmos-terraform-plan#92
• Replace describe-config for atmos-get-setting, add optional cache and azure storage options github-action-atmos-terraform-apply#62
• Skip AWS auth if Gitops aws configuration empty in atmos settings github-action-atmos-terraform-drift-remediation#21

[goruha]

The test failed because it tests no-changes,, but I had to update the stack config to support the new Atmos stack configuration schema.
We ignore it.

[github-actions]

These changes were released in v5.4.0.