kapp app-group deploy should order based on folder names

[rjtch]

What this PR does / why we need it:

Which issue(s) this PR fixes:

Fixes #755

Does this PR introduce a user-facing change?

Additional Notes for your reviewer:

Review Checklist:

• Follows the developer guidelines
• Relevant tests are added or updated
• Relevant docs in this repo added or updated
• Relevant carvel.dev docs added or updated in a separate PR and there's
  a link to that PR
• Code is at least as readable and maintainable as it was before this
  change

Additional documentation e.g., Proposal, usage docs, etc.:

[praveenrewar]

@rjtch DCO check is still failing, could you squash your commits and then sign the final commit?

[rjtch]

@rjtch DCO check is still failing, could you squash your commits and then sign the final commit?

I don't find any solution I tried to fix it using git commit -s --amend and git commit -s -m but it did not work!!!

[praveenrewar]

@rjtch Could you make sure that the user name and the email in the signed off message are the ones that are linked to your account?

[praveenrewar]

@rjtch The DCO bot is happy now. I do see 9 commits but I don't seen any files getting changed 🤔

[rjtch]

@rjtch The DCO bot is happy now. I do see 9 commits but I don't seen any files getting changed 🤔

Maybe through to much rebase things got lost. I will fix it.

[praveenrewar]

LGTM! Thank you so much for the contribution @rjtch