fix(s3select): return encryption response headers (#6819)

crates/e2e_test/src/kms/mod.rs

@@ -57,6 +57,9 @@ mod copy_object_version_restore_sse_test;
 #[cfg(test)]
 mod configured_roundtrip_test;
 
+#[cfg(test)]
+mod select_sse_response_test;
+
 #[cfg(test)]
 mod kms_anonymous_enforcement_test;