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/github.com/google/cel-go/ext/bindings.go

@@ -0,0 +1,100 @@
+// Copyright 2023 Google LLC
+//
+// 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 ext
+
+import (
+	"github.com/google/cel-go/cel"
+	"github.com/google/cel-go/common"
+
+	exprpb "google.golang.org/genproto/googleapis/api/expr/v1alpha1"
+)
+
+// Bindings returns a cel.EnvOption to configure support for local variable
+// bindings in expressions.
+//
+// # Cel.Bind
+//
+// Binds a simple identifier to an initialization expression which may be used
+// in a subsequenct result expression. Bindings may also be nested within each
+// other.
+//
+//	cel.bind(<varName>, <initExpr>, <resultExpr>)
+//
+// Examples:
+//
+//	cel.bind(a, 'hello',
+//	cel.bind(b, 'world', a + b + b + a)) // "helloworldworldhello"
+//
+//	// Avoid a list allocation within the exists comprehension.
+//	cel.bind(valid_values, [a, b, c],
+//	[d, e, f].exists(elem, elem in valid_values))
+//
+// Local bindings are not guaranteed to be evaluated before use.
+func Bindings() cel.EnvOption {
+	return cel.Lib(celBindings{})
+}
+
+const (
+	celNamespace  = "cel"
+	bindMacro     = "bind"
+	unusedIterVar = "#unused"
+)
+
+type celBindings struct{}
+
+func (celBindings) LibraryName() string {
+	return "cel.lib.ext.cel.bindings"
+}
+
+func (celBindings) CompileOptions() []cel.EnvOption {
+	return []cel.EnvOption{
+		cel.Macros(
+			// cel.bind(var, <init>, <expr>)
+			cel.NewReceiverMacro(bindMacro, 3, celBind),
+		),
+	}
+}
+
+func (celBindings) ProgramOptions() []cel.ProgramOption {
+	return []cel.ProgramOption{}
+}
+
+func celBind(meh cel.MacroExprHelper, target *exprpb.Expr, args []*exprpb.Expr) (*exprpb.Expr, *common.Error) {
+	if !macroTargetMatchesNamespace(celNamespace, target) {
+		return nil, nil
+	}
+	varIdent := args[0]
+	varName := ""
+	switch varIdent.GetExprKind().(type) {
+	case *exprpb.Expr_IdentExpr:
+		varName = varIdent.GetIdentExpr().GetName()
+	default:
+		return nil, &common.Error{
+			Message:  "cel.bind() variable names must be simple identifers",
+			Location: meh.OffsetLocation(varIdent.GetId()),
+		}
+	}
+	varInit := args[1]
+	resultExpr := args[2]
+	return meh.Fold(
+		unusedIterVar,
+		meh.NewList(),
+		varName,
+		varInit,
+		meh.LiteralBool(false),
+		meh.Ident(varName),
+		resultExpr,
+	), nil
+}