feat: Implement AWS policy variables support (#1131)

Co-authored-by: houseme <housemecn@gmail.com>
Co-authored-by: loverustfs <hello@rustfs.com>

crates/e2e_test/src/policy/mod.rs

@@ -0,0 +1,22 @@
+// Copyright 2024 RustFS Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+//! Policy-specific tests for RustFS
+//!
+//! This module provides comprehensive tests for AWS IAM policy variables
+//! including single-value, multi-value, and nested variable scenarios.
+
+mod policy_variables_test;
+mod test_env;
+mod test_runner;