S3: Enforce bucket policy (#7471)

* evaluate policies during authorization

* cache bucket policy

* refactor

* matching with regex special characters

* Case Sensitivity, pattern cache, Dead Code Removal

* Fixed Typo, Restored []string Case, Added Cache Size Limit

* hook up with policy engine

* remove old implementation

* action mapping

* validate

* if not specified, fall through to IAM checks

* fmt

* Fail-close on policy evaluation errors

* Explicit `Allow` bypasses IAM checks

* fix error message

* arn:seaweed => arn:aws

* remove legacy support

* fix tests

* Clean up bucket policy after this test

* fix for tests

* address comments

* security fixes

* fix tests

* temp comment out

weed/iam/integration/iam_manager.go

@@ -213,7 +213,7 @@ func (m *IAMManager) CreateRole(ctx context.Context, filerAddress string, roleNa
 
 	// Set role ARN if not provided
 	if roleDef.RoleArn == "" {
-		roleDef.RoleArn = fmt.Sprintf("arn:seaweed:iam::role/%s", roleName)
+		roleDef.RoleArn = fmt.Sprintf("arn:aws:iam::role/%s", roleName)
 	}
 
 	// Validate trust policy