Revert vendor directory to support old golang (GOPATH mode)

gomodule is still in progress to migrate for now, hence multus
team decide to keep vendor directory to support build without
gomodule.

vendor/github.com/json-iterator/go/any_float.go

@@ -0,0 +1,83 @@
+package jsoniter
+
+import (
+	"strconv"
+)
+
+type floatAny struct {
+	baseAny
+	val float64
+}
+
+func (any *floatAny) Parse() *Iterator {
+	return nil
+}
+
+func (any *floatAny) ValueType() ValueType {
+	return NumberValue
+}
+
+func (any *floatAny) MustBeValid() Any {
+	return any
+}
+
+func (any *floatAny) LastError() error {
+	return nil
+}
+
+func (any *floatAny) ToBool() bool {
+	return any.ToFloat64() != 0
+}
+
+func (any *floatAny) ToInt() int {
+	return int(any.val)
+}
+
+func (any *floatAny) ToInt32() int32 {
+	return int32(any.val)
+}
+
+func (any *floatAny) ToInt64() int64 {
+	return int64(any.val)
+}
+
+func (any *floatAny) ToUint() uint {
+	if any.val > 0 {
+		return uint(any.val)
+	}
+	return 0
+}
+
+func (any *floatAny) ToUint32() uint32 {
+	if any.val > 0 {
+		return uint32(any.val)
+	}
+	return 0
+}
+
+func (any *floatAny) ToUint64() uint64 {
+	if any.val > 0 {
+		return uint64(any.val)
+	}
+	return 0
+}
+
+func (any *floatAny) ToFloat32() float32 {
+	return float32(any.val)
+}
+
+func (any *floatAny) ToFloat64() float64 {
+	return any.val
+}
+
+func (any *floatAny) ToString() string {
+	return strconv.FormatFloat(any.val, 'E', -1, 64)
+}
+
+func (any *floatAny) WriteTo(stream *Stream) {
+	stream.WriteFloat64(any.val)
+}
+
+func (any *floatAny) GetInterface() interface{} {
+	return any.val
+}