session state: make register_catalog_list public

For now this function is accessiable only from `SessionContext`, which
may be inconvenient if you already rw locked an inner session state.

Author: askalt

datafusion/core/src/execution/session_state.rs

@@ -104,11 +104,11 @@ use uuid::Uuid;
 /// # #[tokio::main]
 /// # async fn main() -> Result<()> {
 ///     let state = SessionStateBuilder::new()
-///         .with_config(SessionConfig::new())  
+///         .with_config(SessionConfig::new())
 ///         .with_runtime_env(Arc::new(RuntimeEnv::default()))
 ///         .with_default_features()
 ///         .build();
-///     Ok(())  
+///     Ok(())
 /// # }
 /// ```
 ///
@@ -876,7 +876,7 @@ impl SessionState {
     }
 
     /// set the catalog list
-    pub(crate) fn register_catalog_list(
+    pub fn register_catalog_list(
         &mut self,
         catalog_list: Arc<dyn CatalogProviderList>,
     ) {