[Anchor-149] Update DETELE endpoint to take customer types into account

[Ifropc]

PR Checklist

PR Structure

• This PR has reasonably narrow scope (if not, break it down into smaller PRs).
• This PR avoids mixing refactoring changes with feature changes (split into two PRs
  otherwise).
• This PR's title starts with name of package that is most changed in the PR, ex.
  paymentservice.stellar, or all or doc if the changes are broad or impact many
  packages.

Thoroughness

• This PR adds tests for the most critical parts of the new functionality or fixes.

What

Follow-up of #721 : DELETE endpoint was not updated there

Why

Make changes consistent

Known limitations

N/A

[JakeUrban]

LGTM, thanks for getting on this quickly!

[stellar-jenkins]

Something went wrong with PR preview build please check

[lijamie98]

LGTM

Can you also port the changes to develop?

[stellar-jenkins]

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