fix: revert snowflake driver's change

Author: eitsupi

rust/driver/snowflake/src/database/builder.rs

@@ -40,6 +40,7 @@ use crate::{
 
 /// Authentication types.
 #[derive(Copy, Clone, Debug, Default)]
+#[non_exhaustive]
 pub enum AuthType {
     /// General username password authentication
     #[default]
@@ -102,6 +103,7 @@ impl str::FromStr for AuthType {
 
 /// Protocol types.
 #[derive(Copy, Clone, Debug, Default)]
+#[non_exhaustive]
 pub enum Protocol {
     /// Use `https`.
     #[default]
@@ -144,6 +146,7 @@ impl str::FromStr for Protocol {
 
 /// Log levels.
 #[derive(Copy, Clone, Debug, Default)]
+#[non_exhaustive]
 pub enum LogLevel {
     /// Trace level
     Trace,