dependencies: zapr v1.3.0, zap v1.26.0

The new zapr adds support for slog. The new zap has various improvements. It no
longer depends on go.uber.org/atomic which enables dropping it from the
Kubernetes dependencies. github.com/pkg/errors is also no longer needed.

vendor/github.com/go-logr/zapr/zapr_slog.go

@@ -0,0 +1,48 @@
+//go:build go1.21
+// +build go1.21
+
+/*
+Copyright 2023 The logr 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 zapr
+
+import (
+	"log/slog"
+
+	"github.com/go-logr/logr"
+	"go.uber.org/zap"
+	"go.uber.org/zap/zapcore"
+)
+
+func zapIt(field string, val interface{}) zap.Field {
+	switch valTyped := val.(type) {
+	case logr.Marshaler:
+		// Handle types that implement logr.Marshaler: log the replacement
+		// object instead of the original one.
+		field, val = invokeMarshaler(field, valTyped)
+	case slog.LogValuer:
+		// The same for slog.LogValuer. We let slog.Value handle
+		// potential panics and recursion.
+		val = slog.AnyValue(val).Resolve()
+	}
+	if slogValue, ok := val.(slog.Value); ok {
+		return zap.Inline(zapcore.ObjectMarshalerFunc(func(enc zapcore.ObjectEncoder) error {
+			encodeSlog(enc, slog.Attr{Key: field, Value: slogValue})
+			return nil
+		}))
+	}
+	return zap.Any(field, val)
+}