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/topdown/net.go

@@ -0,0 +1,64 @@
+// Copyright 2021 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 topdown
+
+import (
+	"net"
+	"strings"
+
+	"github.com/open-policy-agent/opa/ast"
+	"github.com/open-policy-agent/opa/topdown/builtins"
+)
+
+type lookupIPAddrCacheKey string
+
+// resolv is the same as net.DefaultResolver -- this is for mocking it out in tests
+var resolv = &net.Resolver{}
+
+func builtinLookupIPAddr(bctx BuiltinContext, operands []*ast.Term, iter func(*ast.Term) error) error {
+	a, err := builtins.StringOperand(operands[0].Value, 1)
+	if err != nil {
+		return err
+	}
+	name := string(a)
+
+	err = verifyHost(bctx, name)
+	if err != nil {
+		return err
+	}
+
+	key := lookupIPAddrCacheKey(name)
+	if val, ok := bctx.Cache.Get(key); ok {
+		return iter(val.(*ast.Term))
+	}
+
+	addrs, err := resolv.LookupIPAddr(bctx.Context, name)
+	if err != nil {
+		// NOTE(sr): We can't do better than this right now, see https://github.com/golang/go/issues/36208
+		if strings.Contains(err.Error(), "operation was canceled") || strings.Contains(err.Error(), "i/o timeout") {
+			return Halt{
+				Err: &Error{
+					Code:     CancelErr,
+					Message:  ast.NetLookupIPAddr.Name + ": " + err.Error(),
+					Location: bctx.Location,
+				},
+			}
+		}
+		return err
+	}
+
+	ret := ast.NewSet()
+	for _, a := range addrs {
+		ret.Add(ast.StringTerm(a.String()))
+
+	}
+	t := ast.NewTerm(ret)
+	bctx.Cache.Put(key, t)
+	return iter(t)
+}
+
+func init() {
+	RegisterBuiltinFunc(ast.NetLookupIPAddr.Name, builtinLookupIPAddr)
+}