revert minor refactors

Author: prajjwalkumar17

crates/router/src/core/routing.rs

@@ -1339,7 +1339,7 @@ pub async fn success_based_routing_update_configs(
 
     // refresh cache for success based routing configs
     let cache_key = format!(
-        "{}_{}",
+        "{}:{}",
         profile_id.get_string_repr(),
         algorithm_id.get_string_repr()
     );

crates/router/src/core/routing/helpers.rs

@@ -616,7 +616,7 @@ pub async fn fetch_success_based_routing_configs(
         })?;
 
     let key = format!(
-        "{}_{}",
+        "{}:{}",
         business_profile.get_id().get_string_repr(),
         success_based_routing_id.get_string_repr()
     );