rebase: update kubernetes to 1.28.0 in main

updating kubernetes to 1.28.0
in the main repo.

Signed-off-by: Madhu Rajanna <madhupr007@gmail.com>

vendor/k8s.io/apiserver/pkg/cel/library/test.go

@@ -0,0 +1,79 @@
+/*
+Copyright 2023 The Kubernetes Authors.
+
+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.
+*/
+
+package library
+
+import (
+	"math"
+
+	"github.com/google/cel-go/cel"
+	"github.com/google/cel-go/common/types"
+	"github.com/google/cel-go/common/types/ref"
+)
+
+// Test provides a test() function that returns true.
+func Test(options ...TestOption) cel.EnvOption {
+	t := &testLib{version: math.MaxUint32}
+	for _, o := range options {
+		t = o(t)
+	}
+	return cel.Lib(t)
+}
+
+type testLib struct {
+	version uint32
+}
+
+type TestOption func(*testLib) *testLib
+
+func TestVersion(version uint32) func(lib *testLib) *testLib {
+	return func(sl *testLib) *testLib {
+		sl.version = version
+		return sl
+	}
+}
+
+func (t *testLib) CompileOptions() []cel.EnvOption {
+	var options []cel.EnvOption
+
+	if t.version == 0 {
+		options = append(options, cel.Function("test",
+			cel.Overload("test", []*cel.Type{}, cel.BoolType,
+				cel.FunctionBinding(func(args ...ref.Val) ref.Val {
+					return types.True
+				}))))
+	}
+
+	if t.version >= 1 {
+		options = append(options, cel.Function("test",
+			cel.Overload("test", []*cel.Type{}, cel.BoolType,
+				cel.FunctionBinding(func(args ...ref.Val) ref.Val {
+					// Return false here so tests can observe which version of the function is registered
+					// Actual function libraries must not break backward compatibility
+					return types.False
+				}))))
+		options = append(options, cel.Function("testV1",
+			cel.Overload("testV1", []*cel.Type{}, cel.BoolType,
+				cel.FunctionBinding(func(args ...ref.Val) ref.Val {
+					return types.True
+				}))))
+	}
+	return options
+}
+
+func (*testLib) ProgramOptions() []cel.ProgramOption {
+	return []cel.ProgramOption{}
+}