[#1454] Upgrade NeoFS SDK Go module with new IDs

Core changes:
 * avoid package-colliding variable naming
 * avoid using pointers to IDs where unnecessary
 * avoid using `idSDK` import alias pattern
 * use `EncodeToString` for protocol string calculation and `String` for
  printing

Signed-off-by: Leonard Lyubich <leonard@nspcc.ru>

pkg/core/container/delete.go

@@ -8,7 +8,7 @@ import (
 // RemovalWitness groups the information required
 // to prove and verify the removal of a container.
 type RemovalWitness struct {
-	cid *cid.ID
+	cnr cid.ID
 
 	sig []byte
 
@@ -17,14 +17,14 @@ type RemovalWitness struct {
 
 // ContainerID returns the identifier of the container
 // to be removed.
-func (x RemovalWitness) ContainerID() *cid.ID {
-	return x.cid
+func (x RemovalWitness) ContainerID() cid.ID {
+	return x.cnr
 }
 
 // SetContainerID sets the identifier of the container
 // to be removed.
-func (x *RemovalWitness) SetContainerID(id *cid.ID) {
-	x.cid = id
+func (x *RemovalWitness) SetContainerID(id cid.ID) {
+	x.cnr = id
 }
 
 // Signature returns the signature of the container identifier.

pkg/core/container/fmt_test.go

@@ -27,10 +27,10 @@ func TestCheckFormat(t *testing.T) {
 
 	require.Error(t, CheckFormat(c))
 
-	var oid user.ID
-	user.IDFromKey(&oid, test.DecodeKey(-1).PublicKey)
+	var idUser user.ID
+	user.IDFromKey(&idUser, test.DecodeKey(-1).PublicKey)
 
-	c.SetOwnerID(&oid)
+	c.SetOwnerID(&idUser)
 
 	// set incorrect nonce
 	cV2 := c.ToV2()

pkg/core/container/storage.go

@@ -19,7 +19,7 @@ type Source interface {
 	//
 	// Implementations must not retain the container pointer and modify
 	// the container through it.
-	Get(*cid.ID) (*container.Container, error)
+	Get(cid.ID) (*container.Container, error)
 }
 
 // IsErrNotFound checks if the error returned by Source.Get corresponds