[#344] netmap: Add method Clone

Signed-off-by: Anton Nikiforov <an.nikiforov@yadro.com>

api/netmap/types.go

@@ -1,6 +1,9 @@
 package netmap
 
 import (
+	"bytes"
+	"slices"
+
 	"git.frostfs.info/TrueCloudLab/frostfs-sdk-go/api/refs"
 	"git.frostfs.info/TrueCloudLab/frostfs-sdk-go/api/session"
 )
@@ -382,6 +385,18 @@ func (a *Attribute) SetParents(parent []string) {
 	a.parents = parent
 }
 
+// Clone returns a copy of Attribute.
+func (a *Attribute) Clone() *Attribute {
+	if a == nil {
+		return nil
+	}
+	return &Attribute{
+		parents: slices.Clone(a.parents),
+		value:   a.value,
+		key:     a.key,
+	}
+}
+
 func (ni *NodeInfo) GetPublicKey() []byte {
 	if ni != nil {
 		return ni.publicKey
@@ -465,6 +480,23 @@ func (ni *NodeInfo) SetState(state NodeState) {
 	ni.state = state
 }
 
+// Clone returns a copy of NodeInfo.
+func (ni *NodeInfo) Clone() *NodeInfo {
+	if ni == nil {
+		return nil
+	}
+	dst := NodeInfo{
+		addresses:  slices.Clone(ni.addresses),
+		publicKey:  bytes.Clone(ni.publicKey),
+		state:      ni.state,
+		attributes: make([]Attribute, len(ni.attributes)),
+	}
+	for i, v := range ni.attributes {
+		dst.attributes[i] = *v.Clone()
+	}
+	return &dst
+}
+
 func (l *LocalNodeInfoResponseBody) GetVersion() *refs.Version {
 	if l != nil {
 		return l.version