Change configuration API response to dictionary

**Is your feature request related to a problem? Please describe.**

Change the configuration API response to handle dictionary.
Main issue in dapr/dapr in pasted here.
https://github.com/dapr/dapr/issues/4556

**Describe the solution you'd like**

**Describe alternatives you've considered**

**Additional context**

Start with the referenced dapr/dapr issue 4556, then trace the go-sdk configuration API response entry point. Confirm the expected dictionary shape there and verify that configuration responses handle dictionaries consistently; the issue does not name a file or test to run.

Written by the indexing model from the issue text.