build(deps): bump github.com/open-policy-agent/opa from 1.12.3 to 1.13.1

Bumps [github.com/open-policy-agent/opa](https://github.com/open-policy-agent/opa) from 1.12.3 to 1.13.1.
- [Release notes](https://github.com/open-policy-agent/opa/releases)
- [Changelog](https://github.com/open-policy-agent/opa/blob/main/CHANGELOG.md)
- [Commits](https://github.com/open-policy-agent/opa/compare/v1.12.3...v1.13.1)

---
updated-dependencies:
- dependency-name: github.com/open-policy-agent/opa
  dependency-version: 1.13.1
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>

vendor/github.com/cyphar/filepath-securejoin/pathrs-lite/internal/assert/assert.go

@@ -0,0 +1,30 @@
+// SPDX-License-Identifier: MPL-2.0
+
+// Copyright (C) 2025 Aleksa Sarai <cyphar@cyphar.com>
+// Copyright (C) 2025 SUSE LLC
+//
+// This Source Code Form is subject to the terms of the Mozilla Public
+// License, v. 2.0. If a copy of the MPL was not distributed with this
+// file, You can obtain one at https://mozilla.org/MPL/2.0/.
+
+// Package assert provides some basic assertion helpers for Go.
+package assert
+
+import (
+	"fmt"
+)
+
+// Assert panics if the predicate is false with the provided argument.
+func Assert(predicate bool, msg any) {
+	if !predicate {
+		panic(msg)
+	}
+}
+
+// Assertf panics if the predicate is false and formats the message using the
+// same formatting as [fmt.Printf].
+//
+// [fmt.Printf]: https://pkg.go.dev/fmt#Printf
+func Assertf(predicate bool, fmtMsg string, args ...any) {
+	Assert(predicate, fmt.Sprintf(fmtMsg, args...))
+}