Upgrade dependent version: github.com/open-policy-agent/opa (#5315)

Upgrade dependent version: github.com/open-policy-agent/opa v0.18.0 -> v0.45.0

Signed-off-by: hongzhouzi <hongzhouzi@kubesphere.io>

Signed-off-by: hongzhouzi <hongzhouzi@kubesphere.io>

vendor/github.com/open-policy-agent/opa/internal/wasm/util/util.go

@@ -0,0 +1,18 @@
+// Copyright 2020 The OPA Authors.  All rights reserved.
+// Use of this source code is governed by an Apache2
+// license that can be found in the LICENSE file.
+
+package util
+
+// PageSize represents the WASM page size in bytes.
+const PageSize = 65535
+
+// Pages converts a byte size to Pages, rounding up as necessary.
+func Pages(n uint32) uint32 {
+	pages := n / PageSize
+	if pages*PageSize == n {
+		return pages
+	}
+
+	return pages + 1
+}