refactor!: Use latest SDK for flattened config stem

BREAKING CHANGE: Location of service configuration in Consul changed

Also required updating for v3 modules

Signed-off-by: Leonard Goodell leonard.goodell@intel.com

If your build fails due to your commit message not passing the build checks, please review the guidelines here: https://github.com/edgexfoundry/app-service-configurable/blob/main/.github/CONTRIBUTING.md

PR Checklist

Please check if your PR fulfills the following requirements:

[ ] I am not introducing a breaking change (if you are, flag in conventional commit message with BREAKING CHANGE: describing the break)
[x] I am not introducing a new dependency (add notes below if you are)
[ ] I have added unit tests for the new feature or bug fix (if not, why?)
[x] I have fully tested (add details below) this the new feature or bug fix (if not, why?)
[ ] I have opened a PR for the related docs change (if not, why?)

Run no-secure EdgeX stack Build and run from command line

./app-service-configurable -p=sample -cp

Verify service's config is in Consul at edgex/v3/app-sample