RUST-2308 Derive Clone for ConnectionString (#1546)

Co-authored-by: Jeroen Vervaeke <[email protected]>

Author: jeroenvervaeke

driver/src/client/options.rs

@@ -815,7 +815,7 @@ where
 ///
 /// The format of a MongoDB connection string is described [here](https://www.mongodb.com/docs/manual/reference/connection-string/#connection-string-formats).
 #[skip_serializing_none]
-#[derive(Debug, Default, PartialEq, Serialize)]
+#[derive(Clone, Debug, Default, PartialEq, Serialize)]
 #[serde(rename_all = "camelCase")]
 #[non_exhaustive]
 pub struct ConnectionString {