EN-491: Refactor CDP

[amab8901]

Solves: https://worldmobile.atlassian.net/browse/EN-491

Description:
This code is repeated a large number of times in info.rs and dbsync/api.rs:

        let dp = crate::DataProvider::new(crate::DBSyncProvider::new(crate::Config {
            db_path: dotenv::var("DBSYNC_DB_URL").unwrap(),
        }));

I refactored it into a separate function, and then call that function instead of repeating the same code over and over.

Tests:
Passes all the unit tests that develop branch passes. Also passes Docker integration tests for non-query endpoints (can't test query endpoints in Swagger).