session state: make builder clonable

Author: askalt

datafusion/core/src/execution/session_state.rs

@@ -932,6 +932,7 @@ impl SessionState {
 /// be used for all values unless explicitly provided.
 ///
 /// See example on [`SessionState`]
+#[derive(Clone)]
 pub struct SessionStateBuilder {
     session_id: Option<String>,
     analyzer: Option<Analyzer>,