build: move e2e dependencies into e2e/go.mod

Several packages are only used while running the e2e suite. These
packages are less important to update, as the they can not influence the
final executable that is part of the Ceph-CSI container-image.

By moving these dependencies out of the main Ceph-CSI go.mod, it is
easier to identify if a reported CVE affects Ceph-CSI, or only the
testing (like most of the Kubernetes CVEs).

Signed-off-by: Niels de Vos <ndevos@ibm.com>

e2e/vendor/k8s.io/apimachinery/pkg/util/json/json.go

@@ -0,0 +1,121 @@
+/*
+Copyright 2015 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 json
+
+import (
+	"encoding/json"
+	"fmt"
+	"io"
+
+	kjson "sigs.k8s.io/json"
+)
+
+// NewEncoder delegates to json.NewEncoder
+// It is only here so this package can be a drop-in for common encoding/json uses
+func NewEncoder(w io.Writer) *json.Encoder {
+	return json.NewEncoder(w)
+}
+
+// Marshal delegates to json.Marshal
+// It is only here so this package can be a drop-in for common encoding/json uses
+func Marshal(v interface{}) ([]byte, error) {
+	return json.Marshal(v)
+}
+
+// limit recursive depth to prevent stack overflow errors
+const maxDepth = 10000
+
+// Unmarshal unmarshals the given data.
+// Object keys are case-sensitive.
+// Numbers decoded into interface{} fields are converted to int64 or float64.
+func Unmarshal(data []byte, v interface{}) error {
+	return kjson.UnmarshalCaseSensitivePreserveInts(data, v)
+}
+
+// ConvertInterfaceNumbers converts any json.Number values to int64 or float64.
+// Values which are map[string]interface{} or []interface{} are recursively visited
+func ConvertInterfaceNumbers(v *interface{}, depth int) error {
+	var err error
+	switch v2 := (*v).(type) {
+	case json.Number:
+		*v, err = convertNumber(v2)
+	case map[string]interface{}:
+		err = ConvertMapNumbers(v2, depth+1)
+	case []interface{}:
+		err = ConvertSliceNumbers(v2, depth+1)
+	}
+	return err
+}
+
+// ConvertMapNumbers traverses the map, converting any json.Number values to int64 or float64.
+// values which are map[string]interface{} or []interface{} are recursively visited
+func ConvertMapNumbers(m map[string]interface{}, depth int) error {
+	if depth > maxDepth {
+		return fmt.Errorf("exceeded max depth of %d", maxDepth)
+	}
+
+	var err error
+	for k, v := range m {
+		switch v := v.(type) {
+		case json.Number:
+			m[k], err = convertNumber(v)
+		case map[string]interface{}:
+			err = ConvertMapNumbers(v, depth+1)
+		case []interface{}:
+			err = ConvertSliceNumbers(v, depth+1)
+		}
+		if err != nil {
+			return err
+		}
+	}
+	return nil
+}
+
+// ConvertSliceNumbers traverses the slice, converting any json.Number values to int64 or float64.
+// values which are map[string]interface{} or []interface{} are recursively visited
+func ConvertSliceNumbers(s []interface{}, depth int) error {
+	if depth > maxDepth {
+		return fmt.Errorf("exceeded max depth of %d", maxDepth)
+	}
+
+	var err error
+	for i, v := range s {
+		switch v := v.(type) {
+		case json.Number:
+			s[i], err = convertNumber(v)
+		case map[string]interface{}:
+			err = ConvertMapNumbers(v, depth+1)
+		case []interface{}:
+			err = ConvertSliceNumbers(v, depth+1)
+		}
+		if err != nil {
+			return err
+		}
+	}
+	return nil
+}
+
+// convertNumber converts a json.Number to an int64 or float64, or returns an error
+func convertNumber(n json.Number) (interface{}, error) {
+	// Attempt to convert to an int64 first
+	if i, err := n.Int64(); err == nil {
+		return i, nil
+	}
+	// Return a float64 (default json.Decode() behavior)
+	// An overflow will return an error
+	return n.Float64()
+}